1 //===--- Expr.cpp - Expression AST Node Implementation --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Expr class and subclasses.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/APValue.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Attr.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/DeclTemplate.h"
20 #include "clang/AST/EvaluatedExprVisitor.h"
21 #include "clang/AST/Expr.h"
22 #include "clang/AST/ExprCXX.h"
23 #include "clang/AST/Mangle.h"
24 #include "clang/AST/RecordLayout.h"
25 #include "clang/AST/StmtVisitor.h"
26 #include "clang/Basic/Builtins.h"
27 #include "clang/Basic/CharInfo.h"
28 #include "clang/Basic/SourceManager.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "clang/Lex/Lexer.h"
31 #include "clang/Lex/LiteralSupport.h"
32 #include "clang/Sema/SemaDiagnostic.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/raw_ostream.h"
37 using namespace clang;
39 const CXXRecordDecl *Expr::getBestDynamicClassType() const {
40 const Expr *E = ignoreParenBaseCasts();
42 QualType DerivedType = E->getType();
43 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
44 DerivedType = PTy->getPointeeType();
46 if (DerivedType->isDependentType())
49 const RecordType *Ty = DerivedType->castAs<RecordType>();
50 Decl *D = Ty->getDecl();
51 return cast<CXXRecordDecl>(D);
54 const Expr *Expr::skipRValueSubobjectAdjustments(
55 SmallVectorImpl<const Expr *> &CommaLHSs,
56 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
59 E = E->IgnoreParens();
61 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
62 if ((CE->getCastKind() == CK_DerivedToBase ||
63 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
64 E->getType()->isRecordType()) {
66 CXXRecordDecl *Derived
67 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
68 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
72 if (CE->getCastKind() == CK_NoOp) {
76 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
78 assert(ME->getBase()->getType()->isRecordType());
79 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
80 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
82 Adjustments.push_back(SubobjectAdjustment(Field));
87 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
88 if (BO->isPtrMemOp()) {
89 assert(BO->getRHS()->isRValue());
91 const MemberPointerType *MPT =
92 BO->getRHS()->getType()->getAs<MemberPointerType>();
93 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
95 } else if (BO->getOpcode() == BO_Comma) {
96 CommaLHSs.push_back(BO->getLHS());
108 /// isKnownToHaveBooleanValue - Return true if this is an integer expression
109 /// that is known to return 0 or 1. This happens for _Bool/bool expressions
110 /// but also int expressions which are produced by things like comparisons in
112 bool Expr::isKnownToHaveBooleanValue() const {
113 const Expr *E = IgnoreParens();
115 // If this value has _Bool type, it is obvious 0/1.
116 if (E->getType()->isBooleanType()) return true;
117 // If this is a non-scalar-integer type, we don't care enough to try.
118 if (!E->getType()->isIntegralOrEnumerationType()) return false;
120 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
121 switch (UO->getOpcode()) {
123 return UO->getSubExpr()->isKnownToHaveBooleanValue();
131 // Only look through implicit casts. If the user writes
132 // '(int) (a && b)' treat it as an arbitrary int.
133 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
134 return CE->getSubExpr()->isKnownToHaveBooleanValue();
136 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
137 switch (BO->getOpcode()) {
138 default: return false;
139 case BO_LT: // Relational operators.
143 case BO_EQ: // Equality operators.
145 case BO_LAnd: // AND operator.
146 case BO_LOr: // Logical OR operator.
149 case BO_And: // Bitwise AND operator.
150 case BO_Xor: // Bitwise XOR operator.
151 case BO_Or: // Bitwise OR operator.
152 // Handle things like (x==2)|(y==12).
153 return BO->getLHS()->isKnownToHaveBooleanValue() &&
154 BO->getRHS()->isKnownToHaveBooleanValue();
158 return BO->getRHS()->isKnownToHaveBooleanValue();
162 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
163 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
164 CO->getFalseExpr()->isKnownToHaveBooleanValue();
169 // Amusing macro metaprogramming hack: check whether a class provides
170 // a more specific implementation of getExprLoc().
172 // See also Stmt.cpp:{getLocStart(),getLocEnd()}.
174 /// This implementation is used when a class provides a custom
175 /// implementation of getExprLoc.
176 template <class E, class T>
177 SourceLocation getExprLocImpl(const Expr *expr,
178 SourceLocation (T::*v)() const) {
179 return static_cast<const E*>(expr)->getExprLoc();
182 /// This implementation is used when a class doesn't provide
183 /// a custom implementation of getExprLoc. Overload resolution
184 /// should pick it over the implementation above because it's
185 /// more specialized according to function template partial ordering.
187 SourceLocation getExprLocImpl(const Expr *expr,
188 SourceLocation (Expr::*v)() const) {
189 return static_cast<const E*>(expr)->getLocStart();
193 SourceLocation Expr::getExprLoc() const {
194 switch (getStmtClass()) {
195 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
196 #define ABSTRACT_STMT(type)
197 #define STMT(type, base) \
198 case Stmt::type##Class: break;
199 #define EXPR(type, base) \
200 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
201 #include "clang/AST/StmtNodes.inc"
203 llvm_unreachable("unknown expression kind");
206 //===----------------------------------------------------------------------===//
207 // Primary Expressions.
208 //===----------------------------------------------------------------------===//
210 /// \brief Compute the type-, value-, and instantiation-dependence of a
211 /// declaration reference
212 /// based on the declaration being referenced.
213 static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
214 QualType T, bool &TypeDependent,
215 bool &ValueDependent,
216 bool &InstantiationDependent) {
217 TypeDependent = false;
218 ValueDependent = false;
219 InstantiationDependent = false;
221 // (TD) C++ [temp.dep.expr]p3:
222 // An id-expression is type-dependent if it contains:
226 // (VD) C++ [temp.dep.constexpr]p2:
227 // An identifier is value-dependent if it is:
229 // (TD) - an identifier that was declared with dependent type
230 // (VD) - a name declared with a dependent type,
231 if (T->isDependentType()) {
232 TypeDependent = true;
233 ValueDependent = true;
234 InstantiationDependent = true;
236 } else if (T->isInstantiationDependentType()) {
237 InstantiationDependent = true;
240 // (TD) - a conversion-function-id that specifies a dependent type
241 if (D->getDeclName().getNameKind()
242 == DeclarationName::CXXConversionFunctionName) {
243 QualType T = D->getDeclName().getCXXNameType();
244 if (T->isDependentType()) {
245 TypeDependent = true;
246 ValueDependent = true;
247 InstantiationDependent = true;
251 if (T->isInstantiationDependentType())
252 InstantiationDependent = true;
255 // (VD) - the name of a non-type template parameter,
256 if (isa<NonTypeTemplateParmDecl>(D)) {
257 ValueDependent = true;
258 InstantiationDependent = true;
262 // (VD) - a constant with integral or enumeration type and is
263 // initialized with an expression that is value-dependent.
264 // (VD) - a constant with literal type and is initialized with an
265 // expression that is value-dependent [C++11].
266 // (VD) - FIXME: Missing from the standard:
267 // - an entity with reference type and is initialized with an
268 // expression that is value-dependent [C++11]
269 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
270 if ((Ctx.getLangOpts().CPlusPlus11 ?
271 Var->getType()->isLiteralType(Ctx) :
272 Var->getType()->isIntegralOrEnumerationType()) &&
273 (Var->getType().isConstQualified() ||
274 Var->getType()->isReferenceType())) {
275 if (const Expr *Init = Var->getAnyInitializer())
276 if (Init->isValueDependent()) {
277 ValueDependent = true;
278 InstantiationDependent = true;
282 // (VD) - FIXME: Missing from the standard:
283 // - a member function or a static data member of the current
285 if (Var->isStaticDataMember() &&
286 Var->getDeclContext()->isDependentContext()) {
287 ValueDependent = true;
288 InstantiationDependent = true;
289 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
290 if (TInfo->getType()->isIncompleteArrayType())
291 TypeDependent = true;
297 // (VD) - FIXME: Missing from the standard:
298 // - a member function or a static data member of the current
300 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
301 ValueDependent = true;
302 InstantiationDependent = true;
306 void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
307 bool TypeDependent = false;
308 bool ValueDependent = false;
309 bool InstantiationDependent = false;
310 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
311 ValueDependent, InstantiationDependent);
313 ExprBits.TypeDependent |= TypeDependent;
314 ExprBits.ValueDependent |= ValueDependent;
315 ExprBits.InstantiationDependent |= InstantiationDependent;
317 // Is the declaration a parameter pack?
318 if (getDecl()->isParameterPack())
319 ExprBits.ContainsUnexpandedParameterPack = true;
322 DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
323 NestedNameSpecifierLoc QualifierLoc,
324 SourceLocation TemplateKWLoc,
325 ValueDecl *D, bool RefersToEnclosingVariableOrCapture,
326 const DeclarationNameInfo &NameInfo,
328 const TemplateArgumentListInfo *TemplateArgs,
329 QualType T, ExprValueKind VK)
330 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
331 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
332 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
334 getInternalQualifierLoc() = QualifierLoc;
335 auto *NNS = QualifierLoc.getNestedNameSpecifier();
336 if (NNS->isInstantiationDependent())
337 ExprBits.InstantiationDependent = true;
338 if (NNS->containsUnexpandedParameterPack())
339 ExprBits.ContainsUnexpandedParameterPack = true;
341 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
343 getInternalFoundDecl() = FoundD;
344 DeclRefExprBits.HasTemplateKWAndArgsInfo
345 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
346 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
347 RefersToEnclosingVariableOrCapture;
349 bool Dependent = false;
350 bool InstantiationDependent = false;
351 bool ContainsUnexpandedParameterPack = false;
352 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *TemplateArgs,
354 InstantiationDependent,
355 ContainsUnexpandedParameterPack);
356 assert(!Dependent && "built a DeclRefExpr with dependent template args");
357 ExprBits.InstantiationDependent |= InstantiationDependent;
358 ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack;
359 } else if (TemplateKWLoc.isValid()) {
360 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
362 DeclRefExprBits.HadMultipleCandidates = 0;
364 computeDependence(Ctx);
367 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
368 NestedNameSpecifierLoc QualifierLoc,
369 SourceLocation TemplateKWLoc,
371 bool RefersToEnclosingVariableOrCapture,
372 SourceLocation NameLoc,
376 const TemplateArgumentListInfo *TemplateArgs) {
377 return Create(Context, QualifierLoc, TemplateKWLoc, D,
378 RefersToEnclosingVariableOrCapture,
379 DeclarationNameInfo(D->getDeclName(), NameLoc),
380 T, VK, FoundD, TemplateArgs);
383 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
384 NestedNameSpecifierLoc QualifierLoc,
385 SourceLocation TemplateKWLoc,
387 bool RefersToEnclosingVariableOrCapture,
388 const DeclarationNameInfo &NameInfo,
392 const TemplateArgumentListInfo *TemplateArgs) {
393 // Filter out cases where the found Decl is the same as the value refenenced.
397 std::size_t Size = sizeof(DeclRefExpr);
399 Size += sizeof(NestedNameSpecifierLoc);
401 Size += sizeof(NamedDecl *);
403 Size += ASTTemplateKWAndArgsInfo::sizeFor(TemplateArgs->size());
404 else if (TemplateKWLoc.isValid())
405 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
407 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
408 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
409 RefersToEnclosingVariableOrCapture,
410 NameInfo, FoundD, TemplateArgs, T, VK);
413 DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
416 bool HasTemplateKWAndArgsInfo,
417 unsigned NumTemplateArgs) {
418 std::size_t Size = sizeof(DeclRefExpr);
420 Size += sizeof(NestedNameSpecifierLoc);
422 Size += sizeof(NamedDecl *);
423 if (HasTemplateKWAndArgsInfo)
424 Size += ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs);
426 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
427 return new (Mem) DeclRefExpr(EmptyShell());
430 SourceLocation DeclRefExpr::getLocStart() const {
432 return getQualifierLoc().getBeginLoc();
433 return getNameInfo().getLocStart();
435 SourceLocation DeclRefExpr::getLocEnd() const {
436 if (hasExplicitTemplateArgs())
437 return getRAngleLoc();
438 return getNameInfo().getLocEnd();
441 PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentType IT,
443 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
444 FNTy->isDependentType(), FNTy->isDependentType(),
445 FNTy->isInstantiationDependentType(),
446 /*ContainsUnexpandedParameterPack=*/false),
447 Loc(L), Type(IT), FnName(SL) {}
449 StringLiteral *PredefinedExpr::getFunctionName() {
450 return cast_or_null<StringLiteral>(FnName);
453 StringRef PredefinedExpr::getIdentTypeName(PredefinedExpr::IdentType IT) {
458 return "__FUNCTION__";
460 return "__FUNCDNAME__";
462 return "L__FUNCTION__";
464 return "__PRETTY_FUNCTION__";
466 return "__FUNCSIG__";
467 case PrettyFunctionNoVirtual:
470 llvm_unreachable("Unknown ident type for PredefinedExpr");
473 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
474 // expr" policy instead.
475 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
476 ASTContext &Context = CurrentDecl->getASTContext();
478 if (IT == PredefinedExpr::FuncDName) {
479 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
480 std::unique_ptr<MangleContext> MC;
481 MC.reset(Context.createMangleContext());
483 if (MC->shouldMangleDeclName(ND)) {
484 SmallString<256> Buffer;
485 llvm::raw_svector_ostream Out(Buffer);
486 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
487 MC->mangleCXXCtor(CD, Ctor_Base, Out);
488 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
489 MC->mangleCXXDtor(DD, Dtor_Base, Out);
491 MC->mangleName(ND, Out);
494 if (!Buffer.empty() && Buffer.front() == '\01')
495 return Buffer.substr(1);
498 return ND->getIdentifier()->getName();
502 if (auto *BD = dyn_cast<BlockDecl>(CurrentDecl)) {
503 std::unique_ptr<MangleContext> MC;
504 MC.reset(Context.createMangleContext());
505 SmallString<256> Buffer;
506 llvm::raw_svector_ostream Out(Buffer);
507 auto DC = CurrentDecl->getDeclContext();
508 if (DC->isFileContext())
509 MC->mangleGlobalBlock(BD, /*ID*/ nullptr, Out);
510 else if (const auto *CD = dyn_cast<CXXConstructorDecl>(DC))
511 MC->mangleCtorBlock(CD, /*CT*/ Ctor_Complete, BD, Out);
512 else if (const auto *DD = dyn_cast<CXXDestructorDecl>(DC))
513 MC->mangleDtorBlock(DD, /*DT*/ Dtor_Complete, BD, Out);
515 MC->mangleBlock(DC, BD, Out);
518 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
519 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual && IT != FuncSig)
520 return FD->getNameAsString();
522 SmallString<256> Name;
523 llvm::raw_svector_ostream Out(Name);
525 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
526 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
532 PrintingPolicy Policy(Context.getLangOpts());
534 llvm::raw_string_ostream POut(Proto);
536 const FunctionDecl *Decl = FD;
537 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
539 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
540 const FunctionProtoType *FT = nullptr;
541 if (FD->hasWrittenPrototype())
542 FT = dyn_cast<FunctionProtoType>(AFT);
545 switch (FT->getCallConv()) {
546 case CC_C: POut << "__cdecl "; break;
547 case CC_X86StdCall: POut << "__stdcall "; break;
548 case CC_X86FastCall: POut << "__fastcall "; break;
549 case CC_X86ThisCall: POut << "__thiscall "; break;
550 case CC_X86VectorCall: POut << "__vectorcall "; break;
551 // Only bother printing the conventions that MSVC knows about.
556 FD->printQualifiedName(POut, Policy);
560 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
562 POut << Decl->getParamDecl(i)->getType().stream(Policy);
565 if (FT->isVariadic()) {
566 if (FD->getNumParams()) POut << ", ";
572 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
573 const FunctionType *FT = MD->getType()->castAs<FunctionType>();
576 if (FT->isVolatile())
578 RefQualifierKind Ref = MD->getRefQualifier();
579 if (Ref == RQ_LValue)
581 else if (Ref == RQ_RValue)
585 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
587 const DeclContext *Ctx = FD->getDeclContext();
588 while (Ctx && isa<NamedDecl>(Ctx)) {
589 const ClassTemplateSpecializationDecl *Spec
590 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
591 if (Spec && !Spec->isExplicitSpecialization())
592 Specs.push_back(Spec);
593 Ctx = Ctx->getParent();
596 std::string TemplateParams;
597 llvm::raw_string_ostream TOut(TemplateParams);
598 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
600 const TemplateParameterList *Params
601 = (*I)->getSpecializedTemplate()->getTemplateParameters();
602 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
603 assert(Params->size() == Args.size());
604 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
605 StringRef Param = Params->getParam(i)->getName();
606 if (Param.empty()) continue;
607 TOut << Param << " = ";
608 Args.get(i).print(Policy, TOut);
613 FunctionTemplateSpecializationInfo *FSI
614 = FD->getTemplateSpecializationInfo();
615 if (FSI && !FSI->isExplicitSpecialization()) {
616 const TemplateParameterList* Params
617 = FSI->getTemplate()->getTemplateParameters();
618 const TemplateArgumentList* Args = FSI->TemplateArguments;
619 assert(Params->size() == Args->size());
620 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
621 StringRef Param = Params->getParam(i)->getName();
622 if (Param.empty()) continue;
623 TOut << Param << " = ";
624 Args->get(i).print(Policy, TOut);
630 if (!TemplateParams.empty()) {
631 // remove the trailing comma and space
632 TemplateParams.resize(TemplateParams.size() - 2);
633 POut << " [" << TemplateParams << "]";
638 // Print "auto" for all deduced return types. This includes C++1y return
639 // type deduction and lambdas. For trailing return types resolve the
640 // decltype expression. Otherwise print the real type when this is
641 // not a constructor or destructor.
642 if (isa<CXXMethodDecl>(FD) &&
643 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
644 Proto = "auto " + Proto;
645 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
647 ->getAs<DecltypeType>()
648 ->getUnderlyingType()
649 .getAsStringInternal(Proto, Policy);
650 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
651 AFT->getReturnType().getAsStringInternal(Proto, Policy);
656 return Name.str().str();
658 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
659 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
660 // Skip to its enclosing function or method, but not its enclosing
662 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
663 const Decl *D = Decl::castFromDeclContext(DC);
664 return ComputeName(IT, D);
666 llvm_unreachable("CapturedDecl not inside a function or method");
668 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
669 SmallString<256> Name;
670 llvm::raw_svector_ostream Out(Name);
671 Out << (MD->isInstanceMethod() ? '-' : '+');
674 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
675 // a null check to avoid a crash.
676 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
679 if (const ObjCCategoryImplDecl *CID =
680 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
681 Out << '(' << *CID << ')';
684 MD->getSelector().print(Out);
688 return Name.str().str();
690 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
691 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
697 void APNumericStorage::setIntValue(const ASTContext &C,
698 const llvm::APInt &Val) {
702 BitWidth = Val.getBitWidth();
703 unsigned NumWords = Val.getNumWords();
704 const uint64_t* Words = Val.getRawData();
706 pVal = new (C) uint64_t[NumWords];
707 std::copy(Words, Words + NumWords, pVal);
708 } else if (NumWords == 1)
714 IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
715 QualType type, SourceLocation l)
716 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
719 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
720 assert(V.getBitWidth() == C.getIntWidth(type) &&
721 "Integer type is not the correct size for constant.");
726 IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
727 QualType type, SourceLocation l) {
728 return new (C) IntegerLiteral(C, V, type, l);
732 IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
733 return new (C) IntegerLiteral(Empty);
736 FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
737 bool isexact, QualType Type, SourceLocation L)
738 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
739 false, false), Loc(L) {
740 setSemantics(V.getSemantics());
741 FloatingLiteralBits.IsExact = isexact;
745 FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
746 : Expr(FloatingLiteralClass, Empty) {
747 setRawSemantics(IEEEhalf);
748 FloatingLiteralBits.IsExact = false;
752 FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
753 bool isexact, QualType Type, SourceLocation L) {
754 return new (C) FloatingLiteral(C, V, isexact, Type, L);
758 FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
759 return new (C) FloatingLiteral(C, Empty);
762 const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
763 switch(FloatingLiteralBits.Semantics) {
765 return llvm::APFloat::IEEEhalf;
767 return llvm::APFloat::IEEEsingle;
769 return llvm::APFloat::IEEEdouble;
770 case x87DoubleExtended:
771 return llvm::APFloat::x87DoubleExtended;
773 return llvm::APFloat::IEEEquad;
774 case PPCDoubleDouble:
775 return llvm::APFloat::PPCDoubleDouble;
777 llvm_unreachable("Unrecognised floating semantics");
780 void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
781 if (&Sem == &llvm::APFloat::IEEEhalf)
782 FloatingLiteralBits.Semantics = IEEEhalf;
783 else if (&Sem == &llvm::APFloat::IEEEsingle)
784 FloatingLiteralBits.Semantics = IEEEsingle;
785 else if (&Sem == &llvm::APFloat::IEEEdouble)
786 FloatingLiteralBits.Semantics = IEEEdouble;
787 else if (&Sem == &llvm::APFloat::x87DoubleExtended)
788 FloatingLiteralBits.Semantics = x87DoubleExtended;
789 else if (&Sem == &llvm::APFloat::IEEEquad)
790 FloatingLiteralBits.Semantics = IEEEquad;
791 else if (&Sem == &llvm::APFloat::PPCDoubleDouble)
792 FloatingLiteralBits.Semantics = PPCDoubleDouble;
794 llvm_unreachable("Unknown floating semantics");
797 /// getValueAsApproximateDouble - This returns the value as an inaccurate
798 /// double. Note that this may cause loss of precision, but is useful for
799 /// debugging dumps, etc.
800 double FloatingLiteral::getValueAsApproximateDouble() const {
801 llvm::APFloat V = getValue();
803 V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven,
805 return V.convertToDouble();
808 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
809 int CharByteWidth = 0;
813 CharByteWidth = target.getCharWidth();
816 CharByteWidth = target.getWCharWidth();
819 CharByteWidth = target.getChar16Width();
822 CharByteWidth = target.getChar32Width();
825 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
827 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
828 && "character byte widths supported are 1, 2, and 4 only");
829 return CharByteWidth;
832 StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
833 StringKind Kind, bool Pascal, QualType Ty,
834 const SourceLocation *Loc,
836 assert(C.getAsConstantArrayType(Ty) &&
837 "StringLiteral must be of constant array type!");
839 // Allocate enough space for the StringLiteral plus an array of locations for
840 // any concatenated string tokens.
841 void *Mem = C.Allocate(sizeof(StringLiteral)+
842 sizeof(SourceLocation)*(NumStrs-1),
843 llvm::alignOf<StringLiteral>());
844 StringLiteral *SL = new (Mem) StringLiteral(Ty);
846 // OPTIMIZE: could allocate this appended to the StringLiteral.
847 SL->setString(C,Str,Kind,Pascal);
849 SL->TokLocs[0] = Loc[0];
850 SL->NumConcatenated = NumStrs;
853 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
857 StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
859 void *Mem = C.Allocate(sizeof(StringLiteral)+
860 sizeof(SourceLocation)*(NumStrs-1),
861 llvm::alignOf<StringLiteral>());
862 StringLiteral *SL = new (Mem) StringLiteral(QualType());
863 SL->CharByteWidth = 0;
865 SL->NumConcatenated = NumStrs;
869 void StringLiteral::outputString(raw_ostream &OS) const {
871 case Ascii: break; // no prefix.
872 case Wide: OS << 'L'; break;
873 case UTF8: OS << "u8"; break;
874 case UTF16: OS << 'u'; break;
875 case UTF32: OS << 'U'; break;
878 static const char Hex[] = "0123456789ABCDEF";
880 unsigned LastSlashX = getLength();
881 for (unsigned I = 0, N = getLength(); I != N; ++I) {
882 switch (uint32_t Char = getCodeUnit(I)) {
884 // FIXME: Convert UTF-8 back to codepoints before rendering.
886 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
887 // Leave invalid surrogates alone; we'll use \x for those.
888 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
890 uint32_t Trail = getCodeUnit(I + 1);
891 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
892 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
898 // If this is a wide string, output characters over 0xff using \x
899 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
900 // codepoint: use \x escapes for invalid codepoints.
901 if (getKind() == Wide ||
902 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
903 // FIXME: Is this the best way to print wchar_t?
906 while ((Char >> Shift) == 0)
908 for (/**/; Shift >= 0; Shift -= 4)
909 OS << Hex[(Char >> Shift) & 15];
916 << Hex[(Char >> 20) & 15]
917 << Hex[(Char >> 16) & 15];
920 OS << Hex[(Char >> 12) & 15]
921 << Hex[(Char >> 8) & 15]
922 << Hex[(Char >> 4) & 15]
923 << Hex[(Char >> 0) & 15];
927 // If we used \x... for the previous character, and this character is a
928 // hexadecimal digit, prevent it being slurped as part of the \x.
929 if (LastSlashX + 1 == I) {
931 case '0': case '1': case '2': case '3': case '4':
932 case '5': case '6': case '7': case '8': case '9':
933 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
934 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
939 assert(Char <= 0xff &&
940 "Characters above 0xff should already have been handled.");
942 if (isPrintable(Char))
944 else // Output anything hard as an octal escape.
946 << (char)('0' + ((Char >> 6) & 7))
947 << (char)('0' + ((Char >> 3) & 7))
948 << (char)('0' + ((Char >> 0) & 7));
950 // Handle some common non-printable cases to make dumps prettier.
951 case '\\': OS << "\\\\"; break;
952 case '"': OS << "\\\""; break;
953 case '\n': OS << "\\n"; break;
954 case '\t': OS << "\\t"; break;
955 case '\a': OS << "\\a"; break;
956 case '\b': OS << "\\b"; break;
962 void StringLiteral::setString(const ASTContext &C, StringRef Str,
963 StringKind Kind, bool IsPascal) {
964 //FIXME: we assume that the string data comes from a target that uses the same
965 // code unit size and endianess for the type of string.
967 this->IsPascal = IsPascal;
969 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
970 assert((Str.size()%CharByteWidth == 0)
971 && "size of data must be multiple of CharByteWidth");
972 Length = Str.size()/CharByteWidth;
974 switch(CharByteWidth) {
976 char *AStrData = new (C) char[Length];
977 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
978 StrData.asChar = AStrData;
982 uint16_t *AStrData = new (C) uint16_t[Length];
983 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
984 StrData.asUInt16 = AStrData;
988 uint32_t *AStrData = new (C) uint32_t[Length];
989 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
990 StrData.asUInt32 = AStrData;
994 assert(false && "unsupported CharByteWidth");
998 /// getLocationOfByte - Return a source location that points to the specified
999 /// byte of this string literal.
1001 /// Strings are amazingly complex. They can be formed from multiple tokens and
1002 /// can have escape sequences in them in addition to the usual trigraph and
1003 /// escaped newline business. This routine handles this complexity.
1005 SourceLocation StringLiteral::
1006 getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1007 const LangOptions &Features, const TargetInfo &Target) const {
1008 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
1009 "Only narrow string literals are currently supported");
1011 // Loop over all of the tokens in this string until we find the one that
1012 // contains the byte we're looking for.
1015 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
1016 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1018 // Get the spelling of the string so that we can get the data that makes up
1019 // the string literal, not the identifier for the macro it is potentially
1020 // expanded through.
1021 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1023 // Re-lex the token to get its length and original spelling.
1024 std::pair<FileID, unsigned> LocInfo =SM.getDecomposedLoc(StrTokSpellingLoc);
1025 bool Invalid = false;
1026 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1028 return StrTokSpellingLoc;
1030 const char *StrData = Buffer.data()+LocInfo.second;
1032 // Create a lexer starting at the beginning of this token.
1033 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1034 Buffer.begin(), StrData, Buffer.end());
1036 TheLexer.LexFromRawLexer(TheTok);
1038 // Use the StringLiteralParser to compute the length of the string in bytes.
1039 StringLiteralParser SLP(TheTok, SM, Features, Target);
1040 unsigned TokNumBytes = SLP.GetStringLength();
1042 // If the byte is in this token, return the location of the byte.
1043 if (ByteNo < TokNumBytes ||
1044 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1045 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1047 // Now that we know the offset of the token in the spelling, use the
1048 // preprocessor to get the offset in the original source.
1049 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1052 // Move to the next string token.
1054 ByteNo -= TokNumBytes;
1060 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1061 /// corresponds to, e.g. "sizeof" or "[pre]++".
1062 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1064 case UO_PostInc: return "++";
1065 case UO_PostDec: return "--";
1066 case UO_PreInc: return "++";
1067 case UO_PreDec: return "--";
1068 case UO_AddrOf: return "&";
1069 case UO_Deref: return "*";
1070 case UO_Plus: return "+";
1071 case UO_Minus: return "-";
1072 case UO_Not: return "~";
1073 case UO_LNot: return "!";
1074 case UO_Real: return "__real";
1075 case UO_Imag: return "__imag";
1076 case UO_Extension: return "__extension__";
1078 llvm_unreachable("Unknown unary operator");
1082 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1084 default: llvm_unreachable("No unary operator for overloaded function");
1085 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1086 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1087 case OO_Amp: return UO_AddrOf;
1088 case OO_Star: return UO_Deref;
1089 case OO_Plus: return UO_Plus;
1090 case OO_Minus: return UO_Minus;
1091 case OO_Tilde: return UO_Not;
1092 case OO_Exclaim: return UO_LNot;
1096 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1098 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1099 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1100 case UO_AddrOf: return OO_Amp;
1101 case UO_Deref: return OO_Star;
1102 case UO_Plus: return OO_Plus;
1103 case UO_Minus: return OO_Minus;
1104 case UO_Not: return OO_Tilde;
1105 case UO_LNot: return OO_Exclaim;
1106 default: return OO_None;
1111 //===----------------------------------------------------------------------===//
1112 // Postfix Operators.
1113 //===----------------------------------------------------------------------===//
1115 CallExpr::CallExpr(const ASTContext& C, StmtClass SC, Expr *fn,
1116 unsigned NumPreArgs, ArrayRef<Expr*> args, QualType t,
1117 ExprValueKind VK, SourceLocation rparenloc)
1118 : Expr(SC, t, VK, OK_Ordinary,
1119 fn->isTypeDependent(),
1120 fn->isValueDependent(),
1121 fn->isInstantiationDependent(),
1122 fn->containsUnexpandedParameterPack()),
1123 NumArgs(args.size()) {
1125 SubExprs = new (C) Stmt*[args.size()+PREARGS_START+NumPreArgs];
1127 for (unsigned i = 0; i != args.size(); ++i) {
1128 if (args[i]->isTypeDependent())
1129 ExprBits.TypeDependent = true;
1130 if (args[i]->isValueDependent())
1131 ExprBits.ValueDependent = true;
1132 if (args[i]->isInstantiationDependent())
1133 ExprBits.InstantiationDependent = true;
1134 if (args[i]->containsUnexpandedParameterPack())
1135 ExprBits.ContainsUnexpandedParameterPack = true;
1137 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1140 CallExprBits.NumPreArgs = NumPreArgs;
1141 RParenLoc = rparenloc;
1144 CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args,
1145 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1146 : CallExpr(C, CallExprClass, fn, /*NumPreArgs=*/0, args, t, VK, rparenloc) {
1149 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1150 : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {}
1152 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1154 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1155 // FIXME: Why do we allocate this?
1156 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs];
1157 CallExprBits.NumPreArgs = NumPreArgs;
1160 Decl *CallExpr::getCalleeDecl() {
1161 Expr *CEE = getCallee()->IgnoreParenImpCasts();
1163 while (SubstNonTypeTemplateParmExpr *NTTP
1164 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1165 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1168 // If we're calling a dereference, look at the pointer instead.
1169 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1170 if (BO->isPtrMemOp())
1171 CEE = BO->getRHS()->IgnoreParenCasts();
1172 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1173 if (UO->getOpcode() == UO_Deref)
1174 CEE = UO->getSubExpr()->IgnoreParenCasts();
1176 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1177 return DRE->getDecl();
1178 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1179 return ME->getMemberDecl();
1184 FunctionDecl *CallExpr::getDirectCallee() {
1185 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1188 /// setNumArgs - This changes the number of arguments present in this call.
1189 /// Any orphaned expressions are deleted by this, and any new operands are set
1191 void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1192 // No change, just return.
1193 if (NumArgs == getNumArgs()) return;
1195 // If shrinking # arguments, just delete the extras and forgot them.
1196 if (NumArgs < getNumArgs()) {
1197 this->NumArgs = NumArgs;
1201 // Otherwise, we are growing the # arguments. New an bigger argument array.
1202 unsigned NumPreArgs = getNumPreArgs();
1203 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1205 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1206 NewSubExprs[i] = SubExprs[i];
1207 // Null out new args.
1208 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1209 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1210 NewSubExprs[i] = nullptr;
1212 if (SubExprs) C.Deallocate(SubExprs);
1213 SubExprs = NewSubExprs;
1214 this->NumArgs = NumArgs;
1217 /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1219 unsigned CallExpr::getBuiltinCallee() const {
1220 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1221 // function. As a result, we try and obtain the DeclRefExpr from the
1222 // ImplicitCastExpr.
1223 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1224 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1227 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1231 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1235 if (!FDecl->getIdentifier())
1238 return FDecl->getBuiltinID();
1241 bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1242 if (unsigned BI = getBuiltinCallee())
1243 return Ctx.BuiltinInfo.isUnevaluated(BI);
1247 QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1248 const Expr *Callee = getCallee();
1249 QualType CalleeType = Callee->getType();
1250 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1251 CalleeType = FnTypePtr->getPointeeType();
1252 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1253 CalleeType = BPT->getPointeeType();
1254 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1255 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1258 // This should never be overloaded and so should never return null.
1259 CalleeType = Expr::findBoundMemberType(Callee);
1262 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1263 return FnType->getReturnType();
1266 SourceLocation CallExpr::getLocStart() const {
1267 if (isa<CXXOperatorCallExpr>(this))
1268 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1270 SourceLocation begin = getCallee()->getLocStart();
1271 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1272 begin = getArg(0)->getLocStart();
1275 SourceLocation CallExpr::getLocEnd() const {
1276 if (isa<CXXOperatorCallExpr>(this))
1277 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1279 SourceLocation end = getRParenLoc();
1280 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1281 end = getArg(getNumArgs() - 1)->getLocEnd();
1285 OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1286 SourceLocation OperatorLoc,
1287 TypeSourceInfo *tsi,
1288 ArrayRef<OffsetOfNode> comps,
1289 ArrayRef<Expr*> exprs,
1290 SourceLocation RParenLoc) {
1291 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1292 sizeof(OffsetOfNode) * comps.size() +
1293 sizeof(Expr*) * exprs.size());
1295 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1299 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1300 unsigned numComps, unsigned numExprs) {
1301 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1302 sizeof(OffsetOfNode) * numComps +
1303 sizeof(Expr*) * numExprs);
1304 return new (Mem) OffsetOfExpr(numComps, numExprs);
1307 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1308 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1309 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1310 SourceLocation RParenLoc)
1311 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1312 /*TypeDependent=*/false,
1313 /*ValueDependent=*/tsi->getType()->isDependentType(),
1314 tsi->getType()->isInstantiationDependentType(),
1315 tsi->getType()->containsUnexpandedParameterPack()),
1316 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1317 NumComps(comps.size()), NumExprs(exprs.size())
1319 for (unsigned i = 0; i != comps.size(); ++i) {
1320 setComponent(i, comps[i]);
1323 for (unsigned i = 0; i != exprs.size(); ++i) {
1324 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1325 ExprBits.ValueDependent = true;
1326 if (exprs[i]->containsUnexpandedParameterPack())
1327 ExprBits.ContainsUnexpandedParameterPack = true;
1329 setIndexExpr(i, exprs[i]);
1333 IdentifierInfo *OffsetOfExpr::OffsetOfNode::getFieldName() const {
1334 assert(getKind() == Field || getKind() == Identifier);
1335 if (getKind() == Field)
1336 return getField()->getIdentifier();
1338 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1341 UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1342 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1343 SourceLocation op, SourceLocation rp)
1344 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1345 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1346 // Value-dependent if the argument is type-dependent.
1347 E->isTypeDependent(), E->isInstantiationDependent(),
1348 E->containsUnexpandedParameterPack()),
1349 OpLoc(op), RParenLoc(rp) {
1350 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1351 UnaryExprOrTypeTraitExprBits.IsType = false;
1354 // Check to see if we are in the situation where alignof(decl) should be
1355 // dependent because decl's alignment is dependent.
1356 if (ExprKind == UETT_AlignOf) {
1357 if (!isValueDependent() || !isInstantiationDependent()) {
1358 E = E->IgnoreParens();
1360 const ValueDecl *D = nullptr;
1361 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1363 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1364 D = ME->getMemberDecl();
1367 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1368 if (I->isAlignmentDependent()) {
1369 setValueDependent(true);
1370 setInstantiationDependent(true);
1379 MemberExpr *MemberExpr::Create(
1380 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1381 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1382 ValueDecl *memberdecl, DeclAccessPair founddecl,
1383 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1384 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1385 std::size_t Size = sizeof(MemberExpr);
1387 bool hasQualOrFound = (QualifierLoc ||
1388 founddecl.getDecl() != memberdecl ||
1389 founddecl.getAccess() != memberdecl->getAccess());
1391 Size += sizeof(MemberNameQualifier);
1394 Size += ASTTemplateKWAndArgsInfo::sizeFor(targs->size());
1395 else if (TemplateKWLoc.isValid())
1396 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
1398 void *Mem = C.Allocate(Size, llvm::alignOf<MemberExpr>());
1399 MemberExpr *E = new (Mem)
1400 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1402 if (hasQualOrFound) {
1403 // FIXME: Wrong. We should be looking at the member declaration we found.
1404 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1405 E->setValueDependent(true);
1406 E->setTypeDependent(true);
1407 E->setInstantiationDependent(true);
1409 else if (QualifierLoc &&
1410 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1411 E->setInstantiationDependent(true);
1413 E->HasQualifierOrFoundDecl = true;
1415 MemberNameQualifier *NQ = E->getMemberQualifier();
1416 NQ->QualifierLoc = QualifierLoc;
1417 NQ->FoundDecl = founddecl;
1420 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1423 bool Dependent = false;
1424 bool InstantiationDependent = false;
1425 bool ContainsUnexpandedParameterPack = false;
1426 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *targs,
1428 InstantiationDependent,
1429 ContainsUnexpandedParameterPack);
1430 if (InstantiationDependent)
1431 E->setInstantiationDependent(true);
1432 } else if (TemplateKWLoc.isValid()) {
1433 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
1439 SourceLocation MemberExpr::getLocStart() const {
1440 if (isImplicitAccess()) {
1442 return getQualifierLoc().getBeginLoc();
1446 // FIXME: We don't want this to happen. Rather, we should be able to
1447 // detect all kinds of implicit accesses more cleanly.
1448 SourceLocation BaseStartLoc = getBase()->getLocStart();
1449 if (BaseStartLoc.isValid())
1450 return BaseStartLoc;
1453 SourceLocation MemberExpr::getLocEnd() const {
1454 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1455 if (hasExplicitTemplateArgs())
1456 EndLoc = getRAngleLoc();
1457 else if (EndLoc.isInvalid())
1458 EndLoc = getBase()->getLocEnd();
1462 bool CastExpr::CastConsistency() const {
1463 switch (getCastKind()) {
1464 case CK_DerivedToBase:
1465 case CK_UncheckedDerivedToBase:
1466 case CK_DerivedToBaseMemberPointer:
1467 case CK_BaseToDerived:
1468 case CK_BaseToDerivedMemberPointer:
1469 assert(!path_empty() && "Cast kind should have a base path!");
1472 case CK_CPointerToObjCPointerCast:
1473 assert(getType()->isObjCObjectPointerType());
1474 assert(getSubExpr()->getType()->isPointerType());
1475 goto CheckNoBasePath;
1477 case CK_BlockPointerToObjCPointerCast:
1478 assert(getType()->isObjCObjectPointerType());
1479 assert(getSubExpr()->getType()->isBlockPointerType());
1480 goto CheckNoBasePath;
1482 case CK_ReinterpretMemberPointer:
1483 assert(getType()->isMemberPointerType());
1484 assert(getSubExpr()->getType()->isMemberPointerType());
1485 goto CheckNoBasePath;
1488 // Arbitrary casts to C pointer types count as bitcasts.
1489 // Otherwise, we should only have block and ObjC pointer casts
1490 // here if they stay within the type kind.
1491 if (!getType()->isPointerType()) {
1492 assert(getType()->isObjCObjectPointerType() ==
1493 getSubExpr()->getType()->isObjCObjectPointerType());
1494 assert(getType()->isBlockPointerType() ==
1495 getSubExpr()->getType()->isBlockPointerType());
1497 goto CheckNoBasePath;
1499 case CK_AnyPointerToBlockPointerCast:
1500 assert(getType()->isBlockPointerType());
1501 assert(getSubExpr()->getType()->isAnyPointerType() &&
1502 !getSubExpr()->getType()->isBlockPointerType());
1503 goto CheckNoBasePath;
1505 case CK_CopyAndAutoreleaseBlockObject:
1506 assert(getType()->isBlockPointerType());
1507 assert(getSubExpr()->getType()->isBlockPointerType());
1508 goto CheckNoBasePath;
1510 case CK_FunctionToPointerDecay:
1511 assert(getType()->isPointerType());
1512 assert(getSubExpr()->getType()->isFunctionType());
1513 goto CheckNoBasePath;
1515 case CK_AddressSpaceConversion:
1516 assert(getType()->isPointerType());
1517 assert(getSubExpr()->getType()->isPointerType());
1518 assert(getType()->getPointeeType().getAddressSpace() !=
1519 getSubExpr()->getType()->getPointeeType().getAddressSpace());
1520 // These should not have an inheritance path.
1523 case CK_ArrayToPointerDecay:
1524 case CK_NullToMemberPointer:
1525 case CK_NullToPointer:
1526 case CK_ConstructorConversion:
1527 case CK_IntegralToPointer:
1528 case CK_PointerToIntegral:
1530 case CK_VectorSplat:
1531 case CK_IntegralCast:
1532 case CK_IntegralToFloating:
1533 case CK_FloatingToIntegral:
1534 case CK_FloatingCast:
1535 case CK_ObjCObjectLValueCast:
1536 case CK_FloatingRealToComplex:
1537 case CK_FloatingComplexToReal:
1538 case CK_FloatingComplexCast:
1539 case CK_FloatingComplexToIntegralComplex:
1540 case CK_IntegralRealToComplex:
1541 case CK_IntegralComplexToReal:
1542 case CK_IntegralComplexCast:
1543 case CK_IntegralComplexToFloatingComplex:
1544 case CK_ARCProduceObject:
1545 case CK_ARCConsumeObject:
1546 case CK_ARCReclaimReturnedObject:
1547 case CK_ARCExtendBlockObject:
1548 case CK_ZeroToOCLEvent:
1549 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1550 goto CheckNoBasePath;
1553 case CK_LValueToRValue:
1555 case CK_AtomicToNonAtomic:
1556 case CK_NonAtomicToAtomic:
1557 case CK_PointerToBoolean:
1558 case CK_IntegralToBoolean:
1559 case CK_FloatingToBoolean:
1560 case CK_MemberPointerToBoolean:
1561 case CK_FloatingComplexToBoolean:
1562 case CK_IntegralComplexToBoolean:
1563 case CK_LValueBitCast: // -> bool&
1564 case CK_UserDefinedConversion: // operator bool()
1565 case CK_BuiltinFnToFnPtr:
1567 assert(path_empty() && "Cast kind should not have a base path!");
1573 const char *CastExpr::getCastKindName() const {
1574 switch (getCastKind()) {
1579 case CK_LValueBitCast:
1580 return "LValueBitCast";
1581 case CK_LValueToRValue:
1582 return "LValueToRValue";
1585 case CK_BaseToDerived:
1586 return "BaseToDerived";
1587 case CK_DerivedToBase:
1588 return "DerivedToBase";
1589 case CK_UncheckedDerivedToBase:
1590 return "UncheckedDerivedToBase";
1595 case CK_ArrayToPointerDecay:
1596 return "ArrayToPointerDecay";
1597 case CK_FunctionToPointerDecay:
1598 return "FunctionToPointerDecay";
1599 case CK_NullToMemberPointer:
1600 return "NullToMemberPointer";
1601 case CK_NullToPointer:
1602 return "NullToPointer";
1603 case CK_BaseToDerivedMemberPointer:
1604 return "BaseToDerivedMemberPointer";
1605 case CK_DerivedToBaseMemberPointer:
1606 return "DerivedToBaseMemberPointer";
1607 case CK_ReinterpretMemberPointer:
1608 return "ReinterpretMemberPointer";
1609 case CK_UserDefinedConversion:
1610 return "UserDefinedConversion";
1611 case CK_ConstructorConversion:
1612 return "ConstructorConversion";
1613 case CK_IntegralToPointer:
1614 return "IntegralToPointer";
1615 case CK_PointerToIntegral:
1616 return "PointerToIntegral";
1617 case CK_PointerToBoolean:
1618 return "PointerToBoolean";
1621 case CK_VectorSplat:
1622 return "VectorSplat";
1623 case CK_IntegralCast:
1624 return "IntegralCast";
1625 case CK_IntegralToBoolean:
1626 return "IntegralToBoolean";
1627 case CK_IntegralToFloating:
1628 return "IntegralToFloating";
1629 case CK_FloatingToIntegral:
1630 return "FloatingToIntegral";
1631 case CK_FloatingCast:
1632 return "FloatingCast";
1633 case CK_FloatingToBoolean:
1634 return "FloatingToBoolean";
1635 case CK_MemberPointerToBoolean:
1636 return "MemberPointerToBoolean";
1637 case CK_CPointerToObjCPointerCast:
1638 return "CPointerToObjCPointerCast";
1639 case CK_BlockPointerToObjCPointerCast:
1640 return "BlockPointerToObjCPointerCast";
1641 case CK_AnyPointerToBlockPointerCast:
1642 return "AnyPointerToBlockPointerCast";
1643 case CK_ObjCObjectLValueCast:
1644 return "ObjCObjectLValueCast";
1645 case CK_FloatingRealToComplex:
1646 return "FloatingRealToComplex";
1647 case CK_FloatingComplexToReal:
1648 return "FloatingComplexToReal";
1649 case CK_FloatingComplexToBoolean:
1650 return "FloatingComplexToBoolean";
1651 case CK_FloatingComplexCast:
1652 return "FloatingComplexCast";
1653 case CK_FloatingComplexToIntegralComplex:
1654 return "FloatingComplexToIntegralComplex";
1655 case CK_IntegralRealToComplex:
1656 return "IntegralRealToComplex";
1657 case CK_IntegralComplexToReal:
1658 return "IntegralComplexToReal";
1659 case CK_IntegralComplexToBoolean:
1660 return "IntegralComplexToBoolean";
1661 case CK_IntegralComplexCast:
1662 return "IntegralComplexCast";
1663 case CK_IntegralComplexToFloatingComplex:
1664 return "IntegralComplexToFloatingComplex";
1665 case CK_ARCConsumeObject:
1666 return "ARCConsumeObject";
1667 case CK_ARCProduceObject:
1668 return "ARCProduceObject";
1669 case CK_ARCReclaimReturnedObject:
1670 return "ARCReclaimReturnedObject";
1671 case CK_ARCExtendBlockObject:
1672 return "ARCExtendBlockObject";
1673 case CK_AtomicToNonAtomic:
1674 return "AtomicToNonAtomic";
1675 case CK_NonAtomicToAtomic:
1676 return "NonAtomicToAtomic";
1677 case CK_CopyAndAutoreleaseBlockObject:
1678 return "CopyAndAutoreleaseBlockObject";
1679 case CK_BuiltinFnToFnPtr:
1680 return "BuiltinFnToFnPtr";
1681 case CK_ZeroToOCLEvent:
1682 return "ZeroToOCLEvent";
1683 case CK_AddressSpaceConversion:
1684 return "AddressSpaceConversion";
1687 llvm_unreachable("Unhandled cast kind!");
1690 Expr *CastExpr::getSubExprAsWritten() {
1691 Expr *SubExpr = nullptr;
1694 SubExpr = E->getSubExpr();
1696 // Skip through reference binding to temporary.
1697 if (MaterializeTemporaryExpr *Materialize
1698 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1699 SubExpr = Materialize->GetTemporaryExpr();
1701 // Skip any temporary bindings; they're implicit.
1702 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1703 SubExpr = Binder->getSubExpr();
1705 // Conversions by constructor and conversion functions have a
1706 // subexpression describing the call; strip it off.
1707 if (E->getCastKind() == CK_ConstructorConversion)
1708 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1709 else if (E->getCastKind() == CK_UserDefinedConversion)
1710 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1712 // If the subexpression we're left with is an implicit cast, look
1713 // through that, too.
1714 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1719 CXXBaseSpecifier **CastExpr::path_buffer() {
1720 switch (getStmtClass()) {
1721 #define ABSTRACT_STMT(x)
1722 #define CASTEXPR(Type, Base) \
1723 case Stmt::Type##Class: \
1724 return reinterpret_cast<CXXBaseSpecifier**>(static_cast<Type*>(this)+1);
1725 #define STMT(Type, Base)
1726 #include "clang/AST/StmtNodes.inc"
1728 llvm_unreachable("non-cast expressions not possible here");
1732 void CastExpr::setCastPath(const CXXCastPath &Path) {
1733 assert(Path.size() == path_size());
1734 memcpy(path_buffer(), Path.data(), Path.size() * sizeof(CXXBaseSpecifier*));
1737 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1738 CastKind Kind, Expr *Operand,
1739 const CXXCastPath *BasePath,
1741 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1743 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1744 ImplicitCastExpr *E =
1745 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1746 if (PathSize) E->setCastPath(*BasePath);
1750 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1751 unsigned PathSize) {
1753 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1754 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1758 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1759 ExprValueKind VK, CastKind K, Expr *Op,
1760 const CXXCastPath *BasePath,
1761 TypeSourceInfo *WrittenTy,
1762 SourceLocation L, SourceLocation R) {
1763 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1765 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1767 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1768 if (PathSize) E->setCastPath(*BasePath);
1772 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1773 unsigned PathSize) {
1775 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1776 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1779 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1780 /// corresponds to, e.g. "<<=".
1781 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1783 case BO_PtrMemD: return ".*";
1784 case BO_PtrMemI: return "->*";
1785 case BO_Mul: return "*";
1786 case BO_Div: return "/";
1787 case BO_Rem: return "%";
1788 case BO_Add: return "+";
1789 case BO_Sub: return "-";
1790 case BO_Shl: return "<<";
1791 case BO_Shr: return ">>";
1792 case BO_LT: return "<";
1793 case BO_GT: return ">";
1794 case BO_LE: return "<=";
1795 case BO_GE: return ">=";
1796 case BO_EQ: return "==";
1797 case BO_NE: return "!=";
1798 case BO_And: return "&";
1799 case BO_Xor: return "^";
1800 case BO_Or: return "|";
1801 case BO_LAnd: return "&&";
1802 case BO_LOr: return "||";
1803 case BO_Assign: return "=";
1804 case BO_MulAssign: return "*=";
1805 case BO_DivAssign: return "/=";
1806 case BO_RemAssign: return "%=";
1807 case BO_AddAssign: return "+=";
1808 case BO_SubAssign: return "-=";
1809 case BO_ShlAssign: return "<<=";
1810 case BO_ShrAssign: return ">>=";
1811 case BO_AndAssign: return "&=";
1812 case BO_XorAssign: return "^=";
1813 case BO_OrAssign: return "|=";
1814 case BO_Comma: return ",";
1817 llvm_unreachable("Invalid OpCode!");
1821 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1823 default: llvm_unreachable("Not an overloadable binary operator");
1824 case OO_Plus: return BO_Add;
1825 case OO_Minus: return BO_Sub;
1826 case OO_Star: return BO_Mul;
1827 case OO_Slash: return BO_Div;
1828 case OO_Percent: return BO_Rem;
1829 case OO_Caret: return BO_Xor;
1830 case OO_Amp: return BO_And;
1831 case OO_Pipe: return BO_Or;
1832 case OO_Equal: return BO_Assign;
1833 case OO_Less: return BO_LT;
1834 case OO_Greater: return BO_GT;
1835 case OO_PlusEqual: return BO_AddAssign;
1836 case OO_MinusEqual: return BO_SubAssign;
1837 case OO_StarEqual: return BO_MulAssign;
1838 case OO_SlashEqual: return BO_DivAssign;
1839 case OO_PercentEqual: return BO_RemAssign;
1840 case OO_CaretEqual: return BO_XorAssign;
1841 case OO_AmpEqual: return BO_AndAssign;
1842 case OO_PipeEqual: return BO_OrAssign;
1843 case OO_LessLess: return BO_Shl;
1844 case OO_GreaterGreater: return BO_Shr;
1845 case OO_LessLessEqual: return BO_ShlAssign;
1846 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1847 case OO_EqualEqual: return BO_EQ;
1848 case OO_ExclaimEqual: return BO_NE;
1849 case OO_LessEqual: return BO_LE;
1850 case OO_GreaterEqual: return BO_GE;
1851 case OO_AmpAmp: return BO_LAnd;
1852 case OO_PipePipe: return BO_LOr;
1853 case OO_Comma: return BO_Comma;
1854 case OO_ArrowStar: return BO_PtrMemI;
1858 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1859 static const OverloadedOperatorKind OverOps[] = {
1860 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1861 OO_Star, OO_Slash, OO_Percent,
1863 OO_LessLess, OO_GreaterGreater,
1864 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1865 OO_EqualEqual, OO_ExclaimEqual,
1871 OO_Equal, OO_StarEqual,
1872 OO_SlashEqual, OO_PercentEqual,
1873 OO_PlusEqual, OO_MinusEqual,
1874 OO_LessLessEqual, OO_GreaterGreaterEqual,
1875 OO_AmpEqual, OO_CaretEqual,
1879 return OverOps[Opc];
1882 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1883 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1884 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1886 InitExprs(C, initExprs.size()),
1887 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1889 sawArrayRangeDesignator(false);
1890 for (unsigned I = 0; I != initExprs.size(); ++I) {
1891 if (initExprs[I]->isTypeDependent())
1892 ExprBits.TypeDependent = true;
1893 if (initExprs[I]->isValueDependent())
1894 ExprBits.ValueDependent = true;
1895 if (initExprs[I]->isInstantiationDependent())
1896 ExprBits.InstantiationDependent = true;
1897 if (initExprs[I]->containsUnexpandedParameterPack())
1898 ExprBits.ContainsUnexpandedParameterPack = true;
1901 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1904 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1905 if (NumInits > InitExprs.size())
1906 InitExprs.reserve(C, NumInits);
1909 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1910 InitExprs.resize(C, NumInits, nullptr);
1913 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1914 if (Init >= InitExprs.size()) {
1915 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1916 setInit(Init, expr);
1920 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1921 setInit(Init, expr);
1925 void InitListExpr::setArrayFiller(Expr *filler) {
1926 assert(!hasArrayFiller() && "Filler already set!");
1927 ArrayFillerOrUnionFieldInit = filler;
1928 // Fill out any "holes" in the array due to designated initializers.
1929 Expr **inits = getInits();
1930 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1931 if (inits[i] == nullptr)
1935 bool InitListExpr::isStringLiteralInit() const {
1936 if (getNumInits() != 1)
1938 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1939 if (!AT || !AT->getElementType()->isIntegerType())
1941 // It is possible for getInit() to return null.
1942 const Expr *Init = getInit(0);
1945 Init = Init->IgnoreParens();
1946 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1949 SourceLocation InitListExpr::getLocStart() const {
1950 if (InitListExpr *SyntacticForm = getSyntacticForm())
1951 return SyntacticForm->getLocStart();
1952 SourceLocation Beg = LBraceLoc;
1953 if (Beg.isInvalid()) {
1954 // Find the first non-null initializer.
1955 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1956 E = InitExprs.end();
1959 Beg = S->getLocStart();
1967 SourceLocation InitListExpr::getLocEnd() const {
1968 if (InitListExpr *SyntacticForm = getSyntacticForm())
1969 return SyntacticForm->getLocEnd();
1970 SourceLocation End = RBraceLoc;
1971 if (End.isInvalid()) {
1972 // Find the first non-null initializer from the end.
1973 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1974 E = InitExprs.rend();
1977 End = S->getLocEnd();
1985 /// getFunctionType - Return the underlying function type for this block.
1987 const FunctionProtoType *BlockExpr::getFunctionType() const {
1988 // The block pointer is never sugared, but the function type might be.
1989 return cast<BlockPointerType>(getType())
1990 ->getPointeeType()->castAs<FunctionProtoType>();
1993 SourceLocation BlockExpr::getCaretLocation() const {
1994 return TheBlock->getCaretLocation();
1996 const Stmt *BlockExpr::getBody() const {
1997 return TheBlock->getBody();
1999 Stmt *BlockExpr::getBody() {
2000 return TheBlock->getBody();
2004 //===----------------------------------------------------------------------===//
2005 // Generic Expression Routines
2006 //===----------------------------------------------------------------------===//
2008 /// isUnusedResultAWarning - Return true if this immediate expression should
2009 /// be warned about if the result is unused. If so, fill in Loc and Ranges
2010 /// with location to warn on and the source range[s] to report with the
2012 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
2013 SourceRange &R1, SourceRange &R2,
2014 ASTContext &Ctx) const {
2015 // Don't warn if the expr is type dependent. The type could end up
2016 // instantiating to void.
2017 if (isTypeDependent())
2020 switch (getStmtClass()) {
2022 if (getType()->isVoidType())
2026 R1 = getSourceRange();
2028 case ParenExprClass:
2029 return cast<ParenExpr>(this)->getSubExpr()->
2030 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2031 case GenericSelectionExprClass:
2032 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2033 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2034 case ChooseExprClass:
2035 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2036 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2037 case UnaryOperatorClass: {
2038 const UnaryOperator *UO = cast<UnaryOperator>(this);
2040 switch (UO->getOpcode()) {
2051 case UO_PreDec: // ++/--
2052 return false; // Not a warning.
2055 // accessing a piece of a volatile complex is a side-effect.
2056 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2057 .isVolatileQualified())
2061 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2064 Loc = UO->getOperatorLoc();
2065 R1 = UO->getSubExpr()->getSourceRange();
2068 case BinaryOperatorClass: {
2069 const BinaryOperator *BO = cast<BinaryOperator>(this);
2070 switch (BO->getOpcode()) {
2073 // Consider the RHS of comma for side effects. LHS was checked by
2074 // Sema::CheckCommaOperands.
2076 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2077 // lvalue-ness) of an assignment written in a macro.
2078 if (IntegerLiteral *IE =
2079 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2080 if (IE->getValue() == 0)
2082 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2083 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2086 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2087 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2091 if (BO->isAssignmentOp())
2094 Loc = BO->getOperatorLoc();
2095 R1 = BO->getLHS()->getSourceRange();
2096 R2 = BO->getRHS()->getSourceRange();
2099 case CompoundAssignOperatorClass:
2100 case VAArgExprClass:
2101 case AtomicExprClass:
2104 case ConditionalOperatorClass: {
2105 // If only one of the LHS or RHS is a warning, the operator might
2106 // be being used for control flow. Only warn if both the LHS and
2107 // RHS are warnings.
2108 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2109 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2113 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2116 case MemberExprClass:
2118 Loc = cast<MemberExpr>(this)->getMemberLoc();
2119 R1 = SourceRange(Loc, Loc);
2120 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2123 case ArraySubscriptExprClass:
2125 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2126 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2127 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2130 case CXXOperatorCallExprClass: {
2131 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2132 // overloads as there is no reasonable way to define these such that they
2133 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2134 // warning: operators == and != are commonly typo'ed, and so warning on them
2135 // provides additional value as well. If this list is updated,
2136 // DiagnoseUnusedComparison should be as well.
2137 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2138 switch (Op->getOperator()) {
2142 case OO_ExclaimEqual:
2145 case OO_GreaterEqual:
2147 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2148 Op->getCallReturnType(Ctx)->isVoidType())
2151 Loc = Op->getOperatorLoc();
2152 R1 = Op->getSourceRange();
2156 // Fallthrough for generic call handling.
2159 case CXXMemberCallExprClass:
2160 case UserDefinedLiteralClass: {
2161 // If this is a direct call, get the callee.
2162 const CallExpr *CE = cast<CallExpr>(this);
2163 if (const Decl *FD = CE->getCalleeDecl()) {
2164 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2165 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2166 : FD->hasAttr<WarnUnusedResultAttr>();
2168 // If the callee has attribute pure, const, or warn_unused_result, warn
2169 // about it. void foo() { strlen("bar"); } should warn.
2171 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2172 // updated to match for QoI.
2173 if (HasWarnUnusedResultAttr ||
2174 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2176 Loc = CE->getCallee()->getLocStart();
2177 R1 = CE->getCallee()->getSourceRange();
2179 if (unsigned NumArgs = CE->getNumArgs())
2180 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2181 CE->getArg(NumArgs-1)->getLocEnd());
2188 // If we don't know precisely what we're looking at, let's not warn.
2189 case UnresolvedLookupExprClass:
2190 case CXXUnresolvedConstructExprClass:
2193 case CXXTemporaryObjectExprClass:
2194 case CXXConstructExprClass: {
2195 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2196 if (Type->hasAttr<WarnUnusedAttr>()) {
2198 Loc = getLocStart();
2199 R1 = getSourceRange();
2206 case ObjCMessageExprClass: {
2207 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2208 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2209 ME->isInstanceMessage() &&
2210 !ME->getType()->isVoidType() &&
2211 ME->getMethodFamily() == OMF_init) {
2214 R1 = ME->getSourceRange();
2218 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2219 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2228 case ObjCPropertyRefExprClass:
2231 R1 = getSourceRange();
2234 case PseudoObjectExprClass: {
2235 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2237 // Only complain about things that have the form of a getter.
2238 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2239 isa<BinaryOperator>(PO->getSyntacticForm()))
2244 R1 = getSourceRange();
2248 case StmtExprClass: {
2249 // Statement exprs don't logically have side effects themselves, but are
2250 // sometimes used in macros in ways that give them a type that is unused.
2251 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2252 // however, if the result of the stmt expr is dead, we don't want to emit a
2254 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2255 if (!CS->body_empty()) {
2256 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2257 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2258 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2259 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2260 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2263 if (getType()->isVoidType())
2266 Loc = cast<StmtExpr>(this)->getLParenLoc();
2267 R1 = getSourceRange();
2270 case CXXFunctionalCastExprClass:
2271 case CStyleCastExprClass: {
2272 // Ignore an explicit cast to void unless the operand is a non-trivial
2274 const CastExpr *CE = cast<CastExpr>(this);
2275 if (CE->getCastKind() == CK_ToVoid) {
2276 if (CE->getSubExpr()->isGLValue() &&
2277 CE->getSubExpr()->getType().isVolatileQualified()) {
2278 const DeclRefExpr *DRE =
2279 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2280 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2281 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2282 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2289 // If this is a cast to a constructor conversion, check the operand.
2290 // Otherwise, the result of the cast is unused.
2291 if (CE->getCastKind() == CK_ConstructorConversion)
2292 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2295 if (const CXXFunctionalCastExpr *CXXCE =
2296 dyn_cast<CXXFunctionalCastExpr>(this)) {
2297 Loc = CXXCE->getLocStart();
2298 R1 = CXXCE->getSubExpr()->getSourceRange();
2300 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2301 Loc = CStyleCE->getLParenLoc();
2302 R1 = CStyleCE->getSubExpr()->getSourceRange();
2306 case ImplicitCastExprClass: {
2307 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2309 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2310 if (ICE->getCastKind() == CK_LValueToRValue &&
2311 ICE->getSubExpr()->getType().isVolatileQualified())
2314 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2316 case CXXDefaultArgExprClass:
2317 return (cast<CXXDefaultArgExpr>(this)
2318 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2319 case CXXDefaultInitExprClass:
2320 return (cast<CXXDefaultInitExpr>(this)
2321 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2323 case CXXNewExprClass:
2324 // FIXME: In theory, there might be new expressions that don't have side
2325 // effects (e.g. a placement new with an uninitialized POD).
2326 case CXXDeleteExprClass:
2328 case CXXBindTemporaryExprClass:
2329 return (cast<CXXBindTemporaryExpr>(this)
2330 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2331 case ExprWithCleanupsClass:
2332 return (cast<ExprWithCleanups>(this)
2333 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2337 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2338 /// returns true, if it is; false otherwise.
2339 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2340 const Expr *E = IgnoreParens();
2341 switch (E->getStmtClass()) {
2344 case ObjCIvarRefExprClass:
2346 case Expr::UnaryOperatorClass:
2347 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2348 case ImplicitCastExprClass:
2349 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2350 case MaterializeTemporaryExprClass:
2351 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2352 ->isOBJCGCCandidate(Ctx);
2353 case CStyleCastExprClass:
2354 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2355 case DeclRefExprClass: {
2356 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2358 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2359 if (VD->hasGlobalStorage())
2361 QualType T = VD->getType();
2362 // dereferencing to a pointer is always a gc'able candidate,
2363 // unless it is __weak.
2364 return T->isPointerType() &&
2365 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2369 case MemberExprClass: {
2370 const MemberExpr *M = cast<MemberExpr>(E);
2371 return M->getBase()->isOBJCGCCandidate(Ctx);
2373 case ArraySubscriptExprClass:
2374 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2378 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2379 if (isTypeDependent())
2381 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2384 QualType Expr::findBoundMemberType(const Expr *expr) {
2385 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2387 // Bound member expressions are always one of these possibilities:
2388 // x->m x.m x->*y x.*y
2389 // (possibly parenthesized)
2391 expr = expr->IgnoreParens();
2392 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2393 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2394 return mem->getMemberDecl()->getType();
2397 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2398 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2400 assert(type->isFunctionType());
2404 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
2408 Expr* Expr::IgnoreParens() {
2411 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2412 E = P->getSubExpr();
2415 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2416 if (P->getOpcode() == UO_Extension) {
2417 E = P->getSubExpr();
2421 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2422 if (!P->isResultDependent()) {
2423 E = P->getResultExpr();
2427 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2428 if (!P->isConditionDependent()) {
2429 E = P->getChosenSubExpr();
2437 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2438 /// or CastExprs or ImplicitCastExprs, returning their operand.
2439 Expr *Expr::IgnoreParenCasts() {
2442 E = E->IgnoreParens();
2443 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2444 E = P->getSubExpr();
2447 if (MaterializeTemporaryExpr *Materialize
2448 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2449 E = Materialize->GetTemporaryExpr();
2452 if (SubstNonTypeTemplateParmExpr *NTTP
2453 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2454 E = NTTP->getReplacement();
2461 Expr *Expr::IgnoreCasts() {
2464 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2465 E = P->getSubExpr();
2468 if (MaterializeTemporaryExpr *Materialize
2469 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2470 E = Materialize->GetTemporaryExpr();
2473 if (SubstNonTypeTemplateParmExpr *NTTP
2474 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2475 E = NTTP->getReplacement();
2482 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2483 /// casts. This is intended purely as a temporary workaround for code
2484 /// that hasn't yet been rewritten to do the right thing about those
2485 /// casts, and may disappear along with the last internal use.
2486 Expr *Expr::IgnoreParenLValueCasts() {
2489 E = E->IgnoreParens();
2490 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2491 if (P->getCastKind() == CK_LValueToRValue) {
2492 E = P->getSubExpr();
2495 } else if (MaterializeTemporaryExpr *Materialize
2496 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2497 E = Materialize->GetTemporaryExpr();
2499 } else if (SubstNonTypeTemplateParmExpr *NTTP
2500 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2501 E = NTTP->getReplacement();
2509 Expr *Expr::ignoreParenBaseCasts() {
2512 E = E->IgnoreParens();
2513 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2514 if (CE->getCastKind() == CK_DerivedToBase ||
2515 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2516 CE->getCastKind() == CK_NoOp) {
2517 E = CE->getSubExpr();
2526 Expr *Expr::IgnoreParenImpCasts() {
2529 E = E->IgnoreParens();
2530 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2531 E = P->getSubExpr();
2534 if (MaterializeTemporaryExpr *Materialize
2535 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2536 E = Materialize->GetTemporaryExpr();
2539 if (SubstNonTypeTemplateParmExpr *NTTP
2540 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2541 E = NTTP->getReplacement();
2548 Expr *Expr::IgnoreConversionOperator() {
2549 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2550 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2551 return MCE->getImplicitObjectArgument();
2556 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2557 /// value (including ptr->int casts of the same size). Strip off any
2558 /// ParenExpr or CastExprs, returning their operand.
2559 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2562 E = E->IgnoreParens();
2564 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2565 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2566 // ptr<->int casts of the same width. We also ignore all identity casts.
2567 Expr *SE = P->getSubExpr();
2569 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2574 if ((E->getType()->isPointerType() ||
2575 E->getType()->isIntegralType(Ctx)) &&
2576 (SE->getType()->isPointerType() ||
2577 SE->getType()->isIntegralType(Ctx)) &&
2578 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2584 if (SubstNonTypeTemplateParmExpr *NTTP
2585 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2586 E = NTTP->getReplacement();
2594 bool Expr::isDefaultArgument() const {
2595 const Expr *E = this;
2596 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2597 E = M->GetTemporaryExpr();
2599 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2600 E = ICE->getSubExprAsWritten();
2602 return isa<CXXDefaultArgExpr>(E);
2605 /// \brief Skip over any no-op casts and any temporary-binding
2607 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2608 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2609 E = M->GetTemporaryExpr();
2611 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2612 if (ICE->getCastKind() == CK_NoOp)
2613 E = ICE->getSubExpr();
2618 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2619 E = BE->getSubExpr();
2621 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2622 if (ICE->getCastKind() == CK_NoOp)
2623 E = ICE->getSubExpr();
2628 return E->IgnoreParens();
2631 /// isTemporaryObject - Determines if this expression produces a
2632 /// temporary of the given class type.
2633 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2634 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2637 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2639 // Temporaries are by definition pr-values of class type.
2640 if (!E->Classify(C).isPRValue()) {
2641 // In this context, property reference is a message call and is pr-value.
2642 if (!isa<ObjCPropertyRefExpr>(E))
2646 // Black-list a few cases which yield pr-values of class type that don't
2647 // refer to temporaries of that type:
2649 // - implicit derived-to-base conversions
2650 if (isa<ImplicitCastExpr>(E)) {
2651 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2652 case CK_DerivedToBase:
2653 case CK_UncheckedDerivedToBase:
2660 // - member expressions (all)
2661 if (isa<MemberExpr>(E))
2664 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2665 if (BO->isPtrMemOp())
2668 // - opaque values (all)
2669 if (isa<OpaqueValueExpr>(E))
2675 bool Expr::isImplicitCXXThis() const {
2676 const Expr *E = this;
2678 // Strip away parentheses and casts we don't care about.
2680 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2681 E = Paren->getSubExpr();
2685 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2686 if (ICE->getCastKind() == CK_NoOp ||
2687 ICE->getCastKind() == CK_LValueToRValue ||
2688 ICE->getCastKind() == CK_DerivedToBase ||
2689 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2690 E = ICE->getSubExpr();
2695 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2696 if (UnOp->getOpcode() == UO_Extension) {
2697 E = UnOp->getSubExpr();
2702 if (const MaterializeTemporaryExpr *M
2703 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2704 E = M->GetTemporaryExpr();
2711 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2712 return This->isImplicit();
2717 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2718 /// in Exprs is type-dependent.
2719 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2720 for (unsigned I = 0; I < Exprs.size(); ++I)
2721 if (Exprs[I]->isTypeDependent())
2727 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2728 const Expr **Culprit) const {
2729 // This function is attempting whether an expression is an initializer
2730 // which can be evaluated at compile-time. It very closely parallels
2731 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2732 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2733 // to isEvaluatable most of the time.
2735 // If we ever capture reference-binding directly in the AST, we can
2736 // kill the second parameter.
2740 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2747 switch (getStmtClass()) {
2749 case StringLiteralClass:
2750 case ObjCEncodeExprClass:
2752 case CXXTemporaryObjectExprClass:
2753 case CXXConstructExprClass: {
2754 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2756 if (CE->getConstructor()->isTrivial() &&
2757 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2758 // Trivial default constructor
2759 if (!CE->getNumArgs()) return true;
2761 // Trivial copy constructor
2762 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2763 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
2768 case CompoundLiteralExprClass: {
2769 // This handles gcc's extension that allows global initializers like
2770 // "struct x {int x;} x = (struct x) {};".
2771 // FIXME: This accepts other cases it shouldn't!
2772 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2773 return Exp->isConstantInitializer(Ctx, false, Culprit);
2775 case DesignatedInitUpdateExprClass: {
2776 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2777 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2778 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2780 case InitListExprClass: {
2781 const InitListExpr *ILE = cast<InitListExpr>(this);
2782 if (ILE->getType()->isArrayType()) {
2783 unsigned numInits = ILE->getNumInits();
2784 for (unsigned i = 0; i < numInits; i++) {
2785 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
2791 if (ILE->getType()->isRecordType()) {
2792 unsigned ElementNo = 0;
2793 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2794 for (const auto *Field : RD->fields()) {
2795 // If this is a union, skip all the fields that aren't being initialized.
2796 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
2799 // Don't emit anonymous bitfields, they just affect layout.
2800 if (Field->isUnnamedBitfield())
2803 if (ElementNo < ILE->getNumInits()) {
2804 const Expr *Elt = ILE->getInit(ElementNo++);
2805 if (Field->isBitField()) {
2806 // Bitfields have to evaluate to an integer.
2807 llvm::APSInt ResultTmp;
2808 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2814 bool RefType = Field->getType()->isReferenceType();
2815 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
2825 case ImplicitValueInitExprClass:
2826 case NoInitExprClass:
2828 case ParenExprClass:
2829 return cast<ParenExpr>(this)->getSubExpr()
2830 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2831 case GenericSelectionExprClass:
2832 return cast<GenericSelectionExpr>(this)->getResultExpr()
2833 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2834 case ChooseExprClass:
2835 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2840 return cast<ChooseExpr>(this)->getChosenSubExpr()
2841 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2842 case UnaryOperatorClass: {
2843 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2844 if (Exp->getOpcode() == UO_Extension)
2845 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2848 case CXXFunctionalCastExprClass:
2849 case CXXStaticCastExprClass:
2850 case ImplicitCastExprClass:
2851 case CStyleCastExprClass:
2852 case ObjCBridgedCastExprClass:
2853 case CXXDynamicCastExprClass:
2854 case CXXReinterpretCastExprClass:
2855 case CXXConstCastExprClass: {
2856 const CastExpr *CE = cast<CastExpr>(this);
2858 // Handle misc casts we want to ignore.
2859 if (CE->getCastKind() == CK_NoOp ||
2860 CE->getCastKind() == CK_LValueToRValue ||
2861 CE->getCastKind() == CK_ToUnion ||
2862 CE->getCastKind() == CK_ConstructorConversion ||
2863 CE->getCastKind() == CK_NonAtomicToAtomic ||
2864 CE->getCastKind() == CK_AtomicToNonAtomic)
2865 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2869 case MaterializeTemporaryExprClass:
2870 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2871 ->isConstantInitializer(Ctx, false, Culprit);
2873 case SubstNonTypeTemplateParmExprClass:
2874 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2875 ->isConstantInitializer(Ctx, false, Culprit);
2876 case CXXDefaultArgExprClass:
2877 return cast<CXXDefaultArgExpr>(this)->getExpr()
2878 ->isConstantInitializer(Ctx, false, Culprit);
2879 case CXXDefaultInitExprClass:
2880 return cast<CXXDefaultInitExpr>(this)->getExpr()
2881 ->isConstantInitializer(Ctx, false, Culprit);
2883 if (isEvaluatable(Ctx))
2891 /// \brief Look for any side effects within a Stmt.
2892 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
2893 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
2894 const bool IncludePossibleEffects;
2895 bool HasSideEffects;
2898 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
2899 : Inherited(Context),
2900 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
2902 bool hasSideEffects() const { return HasSideEffects; }
2904 void VisitExpr(const Expr *E) {
2905 if (!HasSideEffects &&
2906 E->HasSideEffects(Context, IncludePossibleEffects))
2907 HasSideEffects = true;
2912 bool Expr::HasSideEffects(const ASTContext &Ctx,
2913 bool IncludePossibleEffects) const {
2914 // In circumstances where we care about definite side effects instead of
2915 // potential side effects, we want to ignore expressions that are part of a
2916 // macro expansion as a potential side effect.
2917 if (!IncludePossibleEffects && getExprLoc().isMacroID())
2920 if (isInstantiationDependent())
2921 return IncludePossibleEffects;
2923 switch (getStmtClass()) {
2925 #define ABSTRACT_STMT(Type)
2926 #define STMT(Type, Base) case Type##Class:
2927 #define EXPR(Type, Base)
2928 #include "clang/AST/StmtNodes.inc"
2929 llvm_unreachable("unexpected Expr kind");
2931 case DependentScopeDeclRefExprClass:
2932 case CXXUnresolvedConstructExprClass:
2933 case CXXDependentScopeMemberExprClass:
2934 case UnresolvedLookupExprClass:
2935 case UnresolvedMemberExprClass:
2936 case PackExpansionExprClass:
2937 case SubstNonTypeTemplateParmPackExprClass:
2938 case FunctionParmPackExprClass:
2940 case CXXFoldExprClass:
2941 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2943 case DeclRefExprClass:
2944 case ObjCIvarRefExprClass:
2945 case PredefinedExprClass:
2946 case IntegerLiteralClass:
2947 case FloatingLiteralClass:
2948 case ImaginaryLiteralClass:
2949 case StringLiteralClass:
2950 case CharacterLiteralClass:
2951 case OffsetOfExprClass:
2952 case ImplicitValueInitExprClass:
2953 case UnaryExprOrTypeTraitExprClass:
2954 case AddrLabelExprClass:
2955 case GNUNullExprClass:
2956 case NoInitExprClass:
2957 case CXXBoolLiteralExprClass:
2958 case CXXNullPtrLiteralExprClass:
2959 case CXXThisExprClass:
2960 case CXXScalarValueInitExprClass:
2961 case TypeTraitExprClass:
2962 case ArrayTypeTraitExprClass:
2963 case ExpressionTraitExprClass:
2964 case CXXNoexceptExprClass:
2965 case SizeOfPackExprClass:
2966 case ObjCStringLiteralClass:
2967 case ObjCEncodeExprClass:
2968 case ObjCBoolLiteralExprClass:
2969 case CXXUuidofExprClass:
2970 case OpaqueValueExprClass:
2971 // These never have a side-effect.
2975 case CXXOperatorCallExprClass:
2976 case CXXMemberCallExprClass:
2977 case CUDAKernelCallExprClass:
2978 case UserDefinedLiteralClass: {
2979 // We don't know a call definitely has side effects, except for calls
2980 // to pure/const functions that definitely don't.
2981 // If the call itself is considered side-effect free, check the operands.
2982 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
2983 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
2984 if (IsPure || !IncludePossibleEffects)
2989 case BlockExprClass:
2990 case CXXBindTemporaryExprClass:
2991 if (!IncludePossibleEffects)
2995 case MSPropertyRefExprClass:
2996 case CompoundAssignOperatorClass:
2997 case VAArgExprClass:
2998 case AtomicExprClass:
2999 case CXXThrowExprClass:
3000 case CXXNewExprClass:
3001 case CXXDeleteExprClass:
3002 case ExprWithCleanupsClass:
3003 // These always have a side-effect.
3006 case StmtExprClass: {
3007 // StmtExprs have a side-effect if any substatement does.
3008 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3009 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3010 return Finder.hasSideEffects();
3013 case ParenExprClass:
3014 case ArraySubscriptExprClass:
3015 case MemberExprClass:
3016 case ConditionalOperatorClass:
3017 case BinaryConditionalOperatorClass:
3018 case CompoundLiteralExprClass:
3019 case ExtVectorElementExprClass:
3020 case DesignatedInitExprClass:
3021 case DesignatedInitUpdateExprClass:
3022 case ParenListExprClass:
3023 case CXXPseudoDestructorExprClass:
3024 case CXXStdInitializerListExprClass:
3025 case SubstNonTypeTemplateParmExprClass:
3026 case MaterializeTemporaryExprClass:
3027 case ShuffleVectorExprClass:
3028 case ConvertVectorExprClass:
3029 case AsTypeExprClass:
3030 // These have a side-effect if any subexpression does.
3033 case UnaryOperatorClass:
3034 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
3038 case BinaryOperatorClass:
3039 if (cast<BinaryOperator>(this)->isAssignmentOp())
3043 case InitListExprClass:
3044 // FIXME: The children for an InitListExpr doesn't include the array filler.
3045 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3046 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3050 case GenericSelectionExprClass:
3051 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3052 HasSideEffects(Ctx, IncludePossibleEffects);
3054 case ChooseExprClass:
3055 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3056 Ctx, IncludePossibleEffects);
3058 case CXXDefaultArgExprClass:
3059 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3060 Ctx, IncludePossibleEffects);
3062 case CXXDefaultInitExprClass: {
3063 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3064 if (const Expr *E = FD->getInClassInitializer())
3065 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3066 // If we've not yet parsed the initializer, assume it has side-effects.
3070 case CXXDynamicCastExprClass: {
3071 // A dynamic_cast expression has side-effects if it can throw.
3072 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3073 if (DCE->getTypeAsWritten()->isReferenceType() &&
3074 DCE->getCastKind() == CK_Dynamic)
3077 case ImplicitCastExprClass:
3078 case CStyleCastExprClass:
3079 case CXXStaticCastExprClass:
3080 case CXXReinterpretCastExprClass:
3081 case CXXConstCastExprClass:
3082 case CXXFunctionalCastExprClass: {
3083 // While volatile reads are side-effecting in both C and C++, we treat them
3084 // as having possible (not definite) side-effects. This allows idiomatic
3085 // code to behave without warning, such as sizeof(*v) for a volatile-
3086 // qualified pointer.
3087 if (!IncludePossibleEffects)
3090 const CastExpr *CE = cast<CastExpr>(this);
3091 if (CE->getCastKind() == CK_LValueToRValue &&
3092 CE->getSubExpr()->getType().isVolatileQualified())
3097 case CXXTypeidExprClass:
3098 // typeid might throw if its subexpression is potentially-evaluated, so has
3099 // side-effects in that case whether or not its subexpression does.
3100 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3102 case CXXConstructExprClass:
3103 case CXXTemporaryObjectExprClass: {
3104 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3105 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3107 // A trivial constructor does not add any side-effects of its own. Just look
3108 // at its arguments.
3112 case LambdaExprClass: {
3113 const LambdaExpr *LE = cast<LambdaExpr>(this);
3114 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3115 E = LE->capture_end(); I != E; ++I)
3116 if (I->getCaptureKind() == LCK_ByCopy)
3117 // FIXME: Only has a side-effect if the variable is volatile or if
3118 // the copy would invoke a non-trivial copy constructor.
3123 case PseudoObjectExprClass: {
3124 // Only look for side-effects in the semantic form, and look past
3125 // OpaqueValueExpr bindings in that form.
3126 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3127 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3128 E = PO->semantics_end();
3130 const Expr *Subexpr = *I;
3131 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3132 Subexpr = OVE->getSourceExpr();
3133 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3139 case ObjCBoxedExprClass:
3140 case ObjCArrayLiteralClass:
3141 case ObjCDictionaryLiteralClass:
3142 case ObjCSelectorExprClass:
3143 case ObjCProtocolExprClass:
3144 case ObjCIsaExprClass:
3145 case ObjCIndirectCopyRestoreExprClass:
3146 case ObjCSubscriptRefExprClass:
3147 case ObjCBridgedCastExprClass:
3148 case ObjCMessageExprClass:
3149 case ObjCPropertyRefExprClass:
3150 // FIXME: Classify these cases better.
3151 if (IncludePossibleEffects)
3156 // Recurse to children.
3157 for (const Stmt *SubStmt : children())
3159 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3166 /// \brief Look for a call to a non-trivial function within an expression.
3167 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3169 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3174 explicit NonTrivialCallFinder(const ASTContext &Context)
3175 : Inherited(Context), NonTrivial(false) { }
3177 bool hasNonTrivialCall() const { return NonTrivial; }
3179 void VisitCallExpr(const CallExpr *E) {
3180 if (const CXXMethodDecl *Method
3181 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3182 if (Method->isTrivial()) {
3183 // Recurse to children of the call.
3184 Inherited::VisitStmt(E);
3192 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3193 if (E->getConstructor()->isTrivial()) {
3194 // Recurse to children of the call.
3195 Inherited::VisitStmt(E);
3202 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3203 if (E->getTemporary()->getDestructor()->isTrivial()) {
3204 Inherited::VisitStmt(E);
3213 bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3214 NonTrivialCallFinder Finder(Ctx);
3216 return Finder.hasNonTrivialCall();
3219 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3220 /// pointer constant or not, as well as the specific kind of constant detected.
3221 /// Null pointer constants can be integer constant expressions with the
3222 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3223 /// (a GNU extension).
3224 Expr::NullPointerConstantKind
3225 Expr::isNullPointerConstant(ASTContext &Ctx,
3226 NullPointerConstantValueDependence NPC) const {
3227 if (isValueDependent() &&
3228 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3230 case NPC_NeverValueDependent:
3231 llvm_unreachable("Unexpected value dependent expression!");
3232 case NPC_ValueDependentIsNull:
3233 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3234 return NPCK_ZeroExpression;
3236 return NPCK_NotNull;
3238 case NPC_ValueDependentIsNotNull:
3239 return NPCK_NotNull;
3243 // Strip off a cast to void*, if it exists. Except in C++.
3244 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3245 if (!Ctx.getLangOpts().CPlusPlus) {
3246 // Check that it is a cast to void*.
3247 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3248 QualType Pointee = PT->getPointeeType();
3249 if (!Pointee.hasQualifiers() &&
3250 Pointee->isVoidType() && // to void*
3251 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3252 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3255 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3256 // Ignore the ImplicitCastExpr type entirely.
3257 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3258 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3259 // Accept ((void*)0) as a null pointer constant, as many other
3260 // implementations do.
3261 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3262 } else if (const GenericSelectionExpr *GE =
3263 dyn_cast<GenericSelectionExpr>(this)) {
3264 if (GE->isResultDependent())
3265 return NPCK_NotNull;
3266 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3267 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3268 if (CE->isConditionDependent())
3269 return NPCK_NotNull;
3270 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3271 } else if (const CXXDefaultArgExpr *DefaultArg
3272 = dyn_cast<CXXDefaultArgExpr>(this)) {
3273 // See through default argument expressions.
3274 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3275 } else if (const CXXDefaultInitExpr *DefaultInit
3276 = dyn_cast<CXXDefaultInitExpr>(this)) {
3277 // See through default initializer expressions.
3278 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3279 } else if (isa<GNUNullExpr>(this)) {
3280 // The GNU __null extension is always a null pointer constant.
3281 return NPCK_GNUNull;
3282 } else if (const MaterializeTemporaryExpr *M
3283 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3284 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3285 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3286 if (const Expr *Source = OVE->getSourceExpr())
3287 return Source->isNullPointerConstant(Ctx, NPC);
3290 // C++11 nullptr_t is always a null pointer constant.
3291 if (getType()->isNullPtrType())
3292 return NPCK_CXX11_nullptr;
3294 if (const RecordType *UT = getType()->getAsUnionType())
3295 if (!Ctx.getLangOpts().CPlusPlus11 &&
3296 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3297 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3298 const Expr *InitExpr = CLE->getInitializer();
3299 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3300 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3302 // This expression must be an integer type.
3303 if (!getType()->isIntegerType() ||
3304 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3305 return NPCK_NotNull;
3307 if (Ctx.getLangOpts().CPlusPlus11) {
3308 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3309 // value zero or a prvalue of type std::nullptr_t.
3310 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3311 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3312 if (Lit && !Lit->getValue())
3313 return NPCK_ZeroLiteral;
3314 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3315 return NPCK_NotNull;
3317 // If we have an integer constant expression, we need to *evaluate* it and
3318 // test for the value 0.
3319 if (!isIntegerConstantExpr(Ctx))
3320 return NPCK_NotNull;
3323 if (EvaluateKnownConstInt(Ctx) != 0)
3324 return NPCK_NotNull;
3326 if (isa<IntegerLiteral>(this))
3327 return NPCK_ZeroLiteral;
3328 return NPCK_ZeroExpression;
3331 /// \brief If this expression is an l-value for an Objective C
3332 /// property, find the underlying property reference expression.
3333 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3334 const Expr *E = this;
3336 assert((E->getValueKind() == VK_LValue &&
3337 E->getObjectKind() == OK_ObjCProperty) &&
3338 "expression is not a property reference");
3339 E = E->IgnoreParenCasts();
3340 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3341 if (BO->getOpcode() == BO_Comma) {
3350 return cast<ObjCPropertyRefExpr>(E);
3353 bool Expr::isObjCSelfExpr() const {
3354 const Expr *E = IgnoreParenImpCasts();
3356 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3360 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3364 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3368 return M->getSelfDecl() == Param;
3371 FieldDecl *Expr::getSourceBitField() {
3372 Expr *E = this->IgnoreParens();
3374 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3375 if (ICE->getCastKind() == CK_LValueToRValue ||
3376 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3377 E = ICE->getSubExpr()->IgnoreParens();
3382 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3383 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3384 if (Field->isBitField())
3387 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E))
3388 if (FieldDecl *Ivar = dyn_cast<FieldDecl>(IvarRef->getDecl()))
3389 if (Ivar->isBitField())
3392 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E))
3393 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3394 if (Field->isBitField())
3397 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3398 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3399 return BinOp->getLHS()->getSourceBitField();
3401 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3402 return BinOp->getRHS()->getSourceBitField();
3405 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3406 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3407 return UnOp->getSubExpr()->getSourceBitField();
3412 bool Expr::refersToVectorElement() const {
3413 const Expr *E = this->IgnoreParens();
3415 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3416 if (ICE->getValueKind() != VK_RValue &&
3417 ICE->getCastKind() == CK_NoOp)
3418 E = ICE->getSubExpr()->IgnoreParens();
3423 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3424 return ASE->getBase()->getType()->isVectorType();
3426 if (isa<ExtVectorElementExpr>(E))
3432 /// isArrow - Return true if the base expression is a pointer to vector,
3433 /// return false if the base expression is a vector.
3434 bool ExtVectorElementExpr::isArrow() const {
3435 return getBase()->getType()->isPointerType();
3438 unsigned ExtVectorElementExpr::getNumElements() const {
3439 if (const VectorType *VT = getType()->getAs<VectorType>())
3440 return VT->getNumElements();
3444 /// containsDuplicateElements - Return true if any element access is repeated.
3445 bool ExtVectorElementExpr::containsDuplicateElements() const {
3446 // FIXME: Refactor this code to an accessor on the AST node which returns the
3447 // "type" of component access, and share with code below and in Sema.
3448 StringRef Comp = Accessor->getName();
3450 // Halving swizzles do not contain duplicate elements.
3451 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3454 // Advance past s-char prefix on hex swizzles.
3455 if (Comp[0] == 's' || Comp[0] == 'S')
3456 Comp = Comp.substr(1);
3458 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3459 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3465 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3466 void ExtVectorElementExpr::getEncodedElementAccess(
3467 SmallVectorImpl<unsigned> &Elts) const {
3468 StringRef Comp = Accessor->getName();
3469 if (Comp[0] == 's' || Comp[0] == 'S')
3470 Comp = Comp.substr(1);
3472 bool isHi = Comp == "hi";
3473 bool isLo = Comp == "lo";
3474 bool isEven = Comp == "even";
3475 bool isOdd = Comp == "odd";
3477 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3489 Index = ExtVectorType::getAccessorIdx(Comp[i]);
3491 Elts.push_back(Index);
3495 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3497 SourceLocation LBracLoc,
3498 SourceLocation SuperLoc,
3499 bool IsInstanceSuper,
3502 ArrayRef<SourceLocation> SelLocs,
3503 SelectorLocationsKind SelLocsK,
3504 ObjCMethodDecl *Method,
3505 ArrayRef<Expr *> Args,
3506 SourceLocation RBracLoc,
3508 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary,
3509 /*TypeDependent=*/false, /*ValueDependent=*/false,
3510 /*InstantiationDependent=*/false,
3511 /*ContainsUnexpandedParameterPack=*/false),
3512 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3513 : Sel.getAsOpaquePtr())),
3514 Kind(IsInstanceSuper? SuperInstance : SuperClass),
3515 HasMethod(Method != nullptr), IsDelegateInitCall(false),
3516 IsImplicit(isImplicit), SuperLoc(SuperLoc), LBracLoc(LBracLoc),
3519 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3520 setReceiverPointer(SuperType.getAsOpaquePtr());
3523 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3525 SourceLocation LBracLoc,
3526 TypeSourceInfo *Receiver,
3528 ArrayRef<SourceLocation> SelLocs,
3529 SelectorLocationsKind SelLocsK,
3530 ObjCMethodDecl *Method,
3531 ArrayRef<Expr *> Args,
3532 SourceLocation RBracLoc,
3534 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, T->isDependentType(),
3535 T->isDependentType(), T->isInstantiationDependentType(),
3536 T->containsUnexpandedParameterPack()),
3537 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3538 : Sel.getAsOpaquePtr())),
3540 HasMethod(Method != nullptr), IsDelegateInitCall(false),
3541 IsImplicit(isImplicit), LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3543 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3544 setReceiverPointer(Receiver);
3547 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3549 SourceLocation LBracLoc,
3552 ArrayRef<SourceLocation> SelLocs,
3553 SelectorLocationsKind SelLocsK,
3554 ObjCMethodDecl *Method,
3555 ArrayRef<Expr *> Args,
3556 SourceLocation RBracLoc,
3558 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, Receiver->isTypeDependent(),
3559 Receiver->isTypeDependent(),
3560 Receiver->isInstantiationDependent(),
3561 Receiver->containsUnexpandedParameterPack()),
3562 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3563 : Sel.getAsOpaquePtr())),
3565 HasMethod(Method != nullptr), IsDelegateInitCall(false),
3566 IsImplicit(isImplicit), LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3568 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3569 setReceiverPointer(Receiver);
3572 void ObjCMessageExpr::initArgsAndSelLocs(ArrayRef<Expr *> Args,
3573 ArrayRef<SourceLocation> SelLocs,
3574 SelectorLocationsKind SelLocsK) {
3575 setNumArgs(Args.size());
3576 Expr **MyArgs = getArgs();
3577 for (unsigned I = 0; I != Args.size(); ++I) {
3578 if (Args[I]->isTypeDependent())
3579 ExprBits.TypeDependent = true;
3580 if (Args[I]->isValueDependent())
3581 ExprBits.ValueDependent = true;
3582 if (Args[I]->isInstantiationDependent())
3583 ExprBits.InstantiationDependent = true;
3584 if (Args[I]->containsUnexpandedParameterPack())
3585 ExprBits.ContainsUnexpandedParameterPack = true;
3587 MyArgs[I] = Args[I];
3590 SelLocsKind = SelLocsK;
3591 if (!isImplicit()) {
3592 if (SelLocsK == SelLoc_NonStandard)
3593 std::copy(SelLocs.begin(), SelLocs.end(), getStoredSelLocs());
3597 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3599 SourceLocation LBracLoc,
3600 SourceLocation SuperLoc,
3601 bool IsInstanceSuper,
3604 ArrayRef<SourceLocation> SelLocs,
3605 ObjCMethodDecl *Method,
3606 ArrayRef<Expr *> Args,
3607 SourceLocation RBracLoc,
3609 assert((!SelLocs.empty() || isImplicit) &&
3610 "No selector locs for non-implicit message");
3611 ObjCMessageExpr *Mem;
3612 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3614 Mem = alloc(Context, Args.size(), 0);
3616 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3617 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, SuperLoc, IsInstanceSuper,
3618 SuperType, Sel, SelLocs, SelLocsK,
3619 Method, Args, RBracLoc, isImplicit);
3622 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3624 SourceLocation LBracLoc,
3625 TypeSourceInfo *Receiver,
3627 ArrayRef<SourceLocation> SelLocs,
3628 ObjCMethodDecl *Method,
3629 ArrayRef<Expr *> Args,
3630 SourceLocation RBracLoc,
3632 assert((!SelLocs.empty() || isImplicit) &&
3633 "No selector locs for non-implicit message");
3634 ObjCMessageExpr *Mem;
3635 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3637 Mem = alloc(Context, Args.size(), 0);
3639 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3640 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3641 SelLocs, SelLocsK, Method, Args, RBracLoc,
3645 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3647 SourceLocation LBracLoc,
3650 ArrayRef<SourceLocation> SelLocs,
3651 ObjCMethodDecl *Method,
3652 ArrayRef<Expr *> Args,
3653 SourceLocation RBracLoc,
3655 assert((!SelLocs.empty() || isImplicit) &&
3656 "No selector locs for non-implicit message");
3657 ObjCMessageExpr *Mem;
3658 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3660 Mem = alloc(Context, Args.size(), 0);
3662 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3663 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3664 SelLocs, SelLocsK, Method, Args, RBracLoc,
3668 ObjCMessageExpr *ObjCMessageExpr::CreateEmpty(const ASTContext &Context,
3670 unsigned NumStoredSelLocs) {
3671 ObjCMessageExpr *Mem = alloc(Context, NumArgs, NumStoredSelLocs);
3672 return new (Mem) ObjCMessageExpr(EmptyShell(), NumArgs);
3675 ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C,
3676 ArrayRef<Expr *> Args,
3677 SourceLocation RBraceLoc,
3678 ArrayRef<SourceLocation> SelLocs,
3680 SelectorLocationsKind &SelLocsK) {
3681 SelLocsK = hasStandardSelectorLocs(Sel, SelLocs, Args, RBraceLoc);
3682 unsigned NumStoredSelLocs = (SelLocsK == SelLoc_NonStandard) ? SelLocs.size()
3684 return alloc(C, Args.size(), NumStoredSelLocs);
3687 ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C,
3689 unsigned NumStoredSelLocs) {
3690 unsigned Size = sizeof(ObjCMessageExpr) + sizeof(void *) +
3691 NumArgs * sizeof(Expr *) + NumStoredSelLocs * sizeof(SourceLocation);
3692 return (ObjCMessageExpr *)C.Allocate(Size,
3693 llvm::AlignOf<ObjCMessageExpr>::Alignment);
3696 void ObjCMessageExpr::getSelectorLocs(
3697 SmallVectorImpl<SourceLocation> &SelLocs) const {
3698 for (unsigned i = 0, e = getNumSelectorLocs(); i != e; ++i)
3699 SelLocs.push_back(getSelectorLoc(i));
3702 SourceRange ObjCMessageExpr::getReceiverRange() const {
3703 switch (getReceiverKind()) {
3705 return getInstanceReceiver()->getSourceRange();
3708 return getClassReceiverTypeInfo()->getTypeLoc().getSourceRange();
3712 return getSuperLoc();
3715 llvm_unreachable("Invalid ReceiverKind!");
3718 Selector ObjCMessageExpr::getSelector() const {
3720 return reinterpret_cast<const ObjCMethodDecl *>(SelectorOrMethod)
3722 return Selector(SelectorOrMethod);
3725 QualType ObjCMessageExpr::getReceiverType() const {
3726 switch (getReceiverKind()) {
3728 return getInstanceReceiver()->getType();
3730 return getClassReceiver();
3733 return getSuperType();
3736 llvm_unreachable("unexpected receiver kind");
3739 ObjCInterfaceDecl *ObjCMessageExpr::getReceiverInterface() const {
3740 QualType T = getReceiverType();
3742 if (const ObjCObjectPointerType *Ptr = T->getAs<ObjCObjectPointerType>())
3743 return Ptr->getInterfaceDecl();
3745 if (const ObjCObjectType *Ty = T->getAs<ObjCObjectType>())
3746 return Ty->getInterface();
3751 StringRef ObjCBridgedCastExpr::getBridgeKindName() const {
3752 switch (getBridgeKind()) {
3755 case OBC_BridgeTransfer:
3756 return "__bridge_transfer";
3757 case OBC_BridgeRetained:
3758 return "__bridge_retained";
3761 llvm_unreachable("Invalid BridgeKind!");
3764 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3765 QualType Type, SourceLocation BLoc,
3767 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3768 Type->isDependentType(), Type->isDependentType(),
3769 Type->isInstantiationDependentType(),
3770 Type->containsUnexpandedParameterPack()),
3771 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3773 SubExprs = new (C) Stmt*[args.size()];
3774 for (unsigned i = 0; i != args.size(); i++) {
3775 if (args[i]->isTypeDependent())
3776 ExprBits.TypeDependent = true;
3777 if (args[i]->isValueDependent())
3778 ExprBits.ValueDependent = true;
3779 if (args[i]->isInstantiationDependent())
3780 ExprBits.InstantiationDependent = true;
3781 if (args[i]->containsUnexpandedParameterPack())
3782 ExprBits.ContainsUnexpandedParameterPack = true;
3784 SubExprs[i] = args[i];
3788 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3789 if (SubExprs) C.Deallocate(SubExprs);
3791 this->NumExprs = Exprs.size();
3792 SubExprs = new (C) Stmt*[NumExprs];
3793 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3796 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3797 SourceLocation GenericLoc, Expr *ControllingExpr,
3798 ArrayRef<TypeSourceInfo*> AssocTypes,
3799 ArrayRef<Expr*> AssocExprs,
3800 SourceLocation DefaultLoc,
3801 SourceLocation RParenLoc,
3802 bool ContainsUnexpandedParameterPack,
3803 unsigned ResultIndex)
3804 : Expr(GenericSelectionExprClass,
3805 AssocExprs[ResultIndex]->getType(),
3806 AssocExprs[ResultIndex]->getValueKind(),
3807 AssocExprs[ResultIndex]->getObjectKind(),
3808 AssocExprs[ResultIndex]->isTypeDependent(),
3809 AssocExprs[ResultIndex]->isValueDependent(),
3810 AssocExprs[ResultIndex]->isInstantiationDependent(),
3811 ContainsUnexpandedParameterPack),
3812 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3813 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3814 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3815 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3816 SubExprs[CONTROLLING] = ControllingExpr;
3817 assert(AssocTypes.size() == AssocExprs.size());
3818 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3819 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3822 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3823 SourceLocation GenericLoc, Expr *ControllingExpr,
3824 ArrayRef<TypeSourceInfo*> AssocTypes,
3825 ArrayRef<Expr*> AssocExprs,
3826 SourceLocation DefaultLoc,
3827 SourceLocation RParenLoc,
3828 bool ContainsUnexpandedParameterPack)
3829 : Expr(GenericSelectionExprClass,
3830 Context.DependentTy,
3833 /*isTypeDependent=*/true,
3834 /*isValueDependent=*/true,
3835 /*isInstantiationDependent=*/true,
3836 ContainsUnexpandedParameterPack),
3837 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3838 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3839 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3840 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3841 SubExprs[CONTROLLING] = ControllingExpr;
3842 assert(AssocTypes.size() == AssocExprs.size());
3843 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3844 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3847 //===----------------------------------------------------------------------===//
3848 // DesignatedInitExpr
3849 //===----------------------------------------------------------------------===//
3851 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3852 assert(Kind == FieldDesignator && "Only valid on a field designator");
3853 if (Field.NameOrField & 0x01)
3854 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3856 return getField()->getIdentifier();
3859 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3860 unsigned NumDesignators,
3861 const Designator *Designators,
3862 SourceLocation EqualOrColonLoc,
3864 ArrayRef<Expr*> IndexExprs,
3866 : Expr(DesignatedInitExprClass, Ty,
3867 Init->getValueKind(), Init->getObjectKind(),
3868 Init->isTypeDependent(), Init->isValueDependent(),
3869 Init->isInstantiationDependent(),
3870 Init->containsUnexpandedParameterPack()),
3871 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3872 NumDesignators(NumDesignators), NumSubExprs(IndexExprs.size() + 1) {
3873 this->Designators = new (C) Designator[NumDesignators];
3875 // Record the initializer itself.
3876 child_range Child = children();
3879 // Copy the designators and their subexpressions, computing
3880 // value-dependence along the way.
3881 unsigned IndexIdx = 0;
3882 for (unsigned I = 0; I != NumDesignators; ++I) {
3883 this->Designators[I] = Designators[I];
3885 if (this->Designators[I].isArrayDesignator()) {
3886 // Compute type- and value-dependence.
3887 Expr *Index = IndexExprs[IndexIdx];
3888 if (Index->isTypeDependent() || Index->isValueDependent())
3889 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3890 if (Index->isInstantiationDependent())
3891 ExprBits.InstantiationDependent = true;
3892 // Propagate unexpanded parameter packs.
3893 if (Index->containsUnexpandedParameterPack())
3894 ExprBits.ContainsUnexpandedParameterPack = true;
3896 // Copy the index expressions into permanent storage.
3897 *Child++ = IndexExprs[IndexIdx++];
3898 } else if (this->Designators[I].isArrayRangeDesignator()) {
3899 // Compute type- and value-dependence.
3900 Expr *Start = IndexExprs[IndexIdx];
3901 Expr *End = IndexExprs[IndexIdx + 1];
3902 if (Start->isTypeDependent() || Start->isValueDependent() ||
3903 End->isTypeDependent() || End->isValueDependent()) {
3904 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3905 ExprBits.InstantiationDependent = true;
3906 } else if (Start->isInstantiationDependent() ||
3907 End->isInstantiationDependent()) {
3908 ExprBits.InstantiationDependent = true;
3911 // Propagate unexpanded parameter packs.
3912 if (Start->containsUnexpandedParameterPack() ||
3913 End->containsUnexpandedParameterPack())
3914 ExprBits.ContainsUnexpandedParameterPack = true;
3916 // Copy the start/end expressions into permanent storage.
3917 *Child++ = IndexExprs[IndexIdx++];
3918 *Child++ = IndexExprs[IndexIdx++];
3922 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3925 DesignatedInitExpr *
3926 DesignatedInitExpr::Create(const ASTContext &C, Designator *Designators,
3927 unsigned NumDesignators,
3928 ArrayRef<Expr*> IndexExprs,
3929 SourceLocation ColonOrEqualLoc,
3930 bool UsesColonSyntax, Expr *Init) {
3931 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3932 sizeof(Stmt *) * (IndexExprs.size() + 1), 8);
3933 return new (Mem) DesignatedInitExpr(C, C.VoidTy, NumDesignators, Designators,
3934 ColonOrEqualLoc, UsesColonSyntax,
3938 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3939 unsigned NumIndexExprs) {
3940 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3941 sizeof(Stmt *) * (NumIndexExprs + 1), 8);
3942 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3945 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3946 const Designator *Desigs,
3947 unsigned NumDesigs) {
3948 Designators = new (C) Designator[NumDesigs];
3949 NumDesignators = NumDesigs;
3950 for (unsigned I = 0; I != NumDesigs; ++I)
3951 Designators[I] = Desigs[I];
3954 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3955 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3957 return DIE->getDesignator(0)->getSourceRange();
3958 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3959 DIE->getDesignator(size()-1)->getLocEnd());
3962 SourceLocation DesignatedInitExpr::getLocStart() const {
3963 SourceLocation StartLoc;
3965 *const_cast<DesignatedInitExpr*>(this)->designators_begin();
3966 if (First.isFieldDesignator()) {
3968 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3970 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3973 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3977 SourceLocation DesignatedInitExpr::getLocEnd() const {
3978 return getInit()->getLocEnd();
3981 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3982 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3983 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
3984 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3987 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3988 assert(D.Kind == Designator::ArrayRangeDesignator &&
3989 "Requires array range designator");
3990 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
3991 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3994 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3995 assert(D.Kind == Designator::ArrayRangeDesignator &&
3996 "Requires array range designator");
3997 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
3998 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 2));
4001 /// \brief Replaces the designator at index @p Idx with the series
4002 /// of designators in [First, Last).
4003 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
4004 const Designator *First,
4005 const Designator *Last) {
4006 unsigned NumNewDesignators = Last - First;
4007 if (NumNewDesignators == 0) {
4008 std::copy_backward(Designators + Idx + 1,
4009 Designators + NumDesignators,
4011 --NumNewDesignators;
4013 } else if (NumNewDesignators == 1) {
4014 Designators[Idx] = *First;
4018 Designator *NewDesignators
4019 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
4020 std::copy(Designators, Designators + Idx, NewDesignators);
4021 std::copy(First, Last, NewDesignators + Idx);
4022 std::copy(Designators + Idx + 1, Designators + NumDesignators,
4023 NewDesignators + Idx + NumNewDesignators);
4024 Designators = NewDesignators;
4025 NumDesignators = NumDesignators - 1 + NumNewDesignators;
4028 DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
4029 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
4030 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
4031 OK_Ordinary, false, false, false, false) {
4032 BaseAndUpdaterExprs[0] = baseExpr;
4034 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
4035 ILE->setType(baseExpr->getType());
4036 BaseAndUpdaterExprs[1] = ILE;
4039 SourceLocation DesignatedInitUpdateExpr::getLocStart() const {
4040 return getBase()->getLocStart();
4043 SourceLocation DesignatedInitUpdateExpr::getLocEnd() const {
4044 return getBase()->getLocEnd();
4047 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
4048 ArrayRef<Expr*> exprs,
4049 SourceLocation rparenloc)
4050 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
4051 false, false, false, false),
4052 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
4053 Exprs = new (C) Stmt*[exprs.size()];
4054 for (unsigned i = 0; i != exprs.size(); ++i) {
4055 if (exprs[i]->isTypeDependent())
4056 ExprBits.TypeDependent = true;
4057 if (exprs[i]->isValueDependent())
4058 ExprBits.ValueDependent = true;
4059 if (exprs[i]->isInstantiationDependent())
4060 ExprBits.InstantiationDependent = true;
4061 if (exprs[i]->containsUnexpandedParameterPack())
4062 ExprBits.ContainsUnexpandedParameterPack = true;
4064 Exprs[i] = exprs[i];
4068 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
4069 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
4070 e = ewc->getSubExpr();
4071 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
4072 e = m->GetTemporaryExpr();
4073 e = cast<CXXConstructExpr>(e)->getArg(0);
4074 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
4075 e = ice->getSubExpr();
4076 return cast<OpaqueValueExpr>(e);
4079 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
4081 unsigned numSemanticExprs) {
4082 void *buffer = Context.Allocate(sizeof(PseudoObjectExpr) +
4083 (1 + numSemanticExprs) * sizeof(Expr*),
4084 llvm::alignOf<PseudoObjectExpr>());
4085 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
4088 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
4089 : Expr(PseudoObjectExprClass, shell) {
4090 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
4093 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
4094 ArrayRef<Expr*> semantics,
4095 unsigned resultIndex) {
4096 assert(syntax && "no syntactic expression!");
4097 assert(semantics.size() && "no semantic expressions!");
4101 if (resultIndex == NoResult) {
4105 assert(resultIndex < semantics.size());
4106 type = semantics[resultIndex]->getType();
4107 VK = semantics[resultIndex]->getValueKind();
4108 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
4111 void *buffer = C.Allocate(sizeof(PseudoObjectExpr) +
4112 (1 + semantics.size()) * sizeof(Expr*),
4113 llvm::alignOf<PseudoObjectExpr>());
4114 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
4118 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
4119 Expr *syntax, ArrayRef<Expr*> semantics,
4120 unsigned resultIndex)
4121 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
4122 /*filled in at end of ctor*/ false, false, false, false) {
4123 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
4124 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
4126 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
4127 Expr *E = (i == 0 ? syntax : semantics[i-1]);
4128 getSubExprsBuffer()[i] = E;
4130 if (E->isTypeDependent())
4131 ExprBits.TypeDependent = true;
4132 if (E->isValueDependent())
4133 ExprBits.ValueDependent = true;
4134 if (E->isInstantiationDependent())
4135 ExprBits.InstantiationDependent = true;
4136 if (E->containsUnexpandedParameterPack())
4137 ExprBits.ContainsUnexpandedParameterPack = true;
4139 if (isa<OpaqueValueExpr>(E))
4140 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
4141 "opaque-value semantic expressions for pseudo-object "
4142 "operations must have sources");
4146 //===----------------------------------------------------------------------===//
4148 //===----------------------------------------------------------------------===//
4150 Expr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); }
4151 Expr* ExprIterator::operator*() const { return cast<Expr>(*I); }
4152 Expr* ExprIterator::operator->() const { return cast<Expr>(*I); }
4153 const Expr* ConstExprIterator::operator[](size_t idx) const {
4154 return cast<Expr>(I[idx]);
4156 const Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); }
4157 const Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); }
4159 //===----------------------------------------------------------------------===//
4160 // Child Iterators for iterating over subexpressions/substatements
4161 //===----------------------------------------------------------------------===//
4163 // UnaryExprOrTypeTraitExpr
4164 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
4165 // If this is of a type and the type is a VLA type (and not a typedef), the
4166 // size expression of the VLA needs to be treated as an executable expression.
4167 // Why isn't this weirdness documented better in StmtIterator?
4168 if (isArgumentType()) {
4169 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
4170 getArgumentType().getTypePtr()))
4171 return child_range(child_iterator(T), child_iterator());
4172 return child_range();
4174 return child_range(&Argument.Ex, &Argument.Ex + 1);
4178 Stmt::child_range ObjCMessageExpr::children() {
4180 if (getReceiverKind() == Instance)
4181 begin = reinterpret_cast<Stmt **>(this + 1);
4183 begin = reinterpret_cast<Stmt **>(getArgs());
4184 return child_range(begin,
4185 reinterpret_cast<Stmt **>(getArgs() + getNumArgs()));
4188 ObjCArrayLiteral::ObjCArrayLiteral(ArrayRef<Expr *> Elements,
4189 QualType T, ObjCMethodDecl *Method,
4191 : Expr(ObjCArrayLiteralClass, T, VK_RValue, OK_Ordinary,
4192 false, false, false, false),
4193 NumElements(Elements.size()), Range(SR), ArrayWithObjectsMethod(Method)
4195 Expr **SaveElements = getElements();
4196 for (unsigned I = 0, N = Elements.size(); I != N; ++I) {
4197 if (Elements[I]->isTypeDependent() || Elements[I]->isValueDependent())
4198 ExprBits.ValueDependent = true;
4199 if (Elements[I]->isInstantiationDependent())
4200 ExprBits.InstantiationDependent = true;
4201 if (Elements[I]->containsUnexpandedParameterPack())
4202 ExprBits.ContainsUnexpandedParameterPack = true;
4204 SaveElements[I] = Elements[I];
4208 ObjCArrayLiteral *ObjCArrayLiteral::Create(const ASTContext &C,
4209 ArrayRef<Expr *> Elements,
4210 QualType T, ObjCMethodDecl * Method,
4212 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
4213 + Elements.size() * sizeof(Expr *));
4214 return new (Mem) ObjCArrayLiteral(Elements, T, Method, SR);
4217 ObjCArrayLiteral *ObjCArrayLiteral::CreateEmpty(const ASTContext &C,
4218 unsigned NumElements) {
4220 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
4221 + NumElements * sizeof(Expr *));
4222 return new (Mem) ObjCArrayLiteral(EmptyShell(), NumElements);
4225 ObjCDictionaryLiteral::ObjCDictionaryLiteral(
4226 ArrayRef<ObjCDictionaryElement> VK,
4227 bool HasPackExpansions,
4228 QualType T, ObjCMethodDecl *method,
4230 : Expr(ObjCDictionaryLiteralClass, T, VK_RValue, OK_Ordinary, false, false,
4232 NumElements(VK.size()), HasPackExpansions(HasPackExpansions), Range(SR),
4233 DictWithObjectsMethod(method)
4235 KeyValuePair *KeyValues = getKeyValues();
4236 ExpansionData *Expansions = getExpansionData();
4237 for (unsigned I = 0; I < NumElements; I++) {
4238 if (VK[I].Key->isTypeDependent() || VK[I].Key->isValueDependent() ||
4239 VK[I].Value->isTypeDependent() || VK[I].Value->isValueDependent())
4240 ExprBits.ValueDependent = true;
4241 if (VK[I].Key->isInstantiationDependent() ||
4242 VK[I].Value->isInstantiationDependent())
4243 ExprBits.InstantiationDependent = true;
4244 if (VK[I].EllipsisLoc.isInvalid() &&
4245 (VK[I].Key->containsUnexpandedParameterPack() ||
4246 VK[I].Value->containsUnexpandedParameterPack()))
4247 ExprBits.ContainsUnexpandedParameterPack = true;
4249 KeyValues[I].Key = VK[I].Key;
4250 KeyValues[I].Value = VK[I].Value;
4252 Expansions[I].EllipsisLoc = VK[I].EllipsisLoc;
4253 if (VK[I].NumExpansions)
4254 Expansions[I].NumExpansionsPlusOne = *VK[I].NumExpansions + 1;
4256 Expansions[I].NumExpansionsPlusOne = 0;
4261 ObjCDictionaryLiteral *
4262 ObjCDictionaryLiteral::Create(const ASTContext &C,
4263 ArrayRef<ObjCDictionaryElement> VK,
4264 bool HasPackExpansions,
4265 QualType T, ObjCMethodDecl *method,
4267 unsigned ExpansionsSize = 0;
4268 if (HasPackExpansions)
4269 ExpansionsSize = sizeof(ExpansionData) * VK.size();
4271 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
4272 sizeof(KeyValuePair) * VK.size() + ExpansionsSize);
4273 return new (Mem) ObjCDictionaryLiteral(VK, HasPackExpansions, T, method, SR);
4276 ObjCDictionaryLiteral *
4277 ObjCDictionaryLiteral::CreateEmpty(const ASTContext &C, unsigned NumElements,
4278 bool HasPackExpansions) {
4279 unsigned ExpansionsSize = 0;
4280 if (HasPackExpansions)
4281 ExpansionsSize = sizeof(ExpansionData) * NumElements;
4282 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
4283 sizeof(KeyValuePair) * NumElements + ExpansionsSize);
4284 return new (Mem) ObjCDictionaryLiteral(EmptyShell(), NumElements,
4288 ObjCSubscriptRefExpr *ObjCSubscriptRefExpr::Create(const ASTContext &C,
4290 Expr *key, QualType T,
4291 ObjCMethodDecl *getMethod,
4292 ObjCMethodDecl *setMethod,
4293 SourceLocation RB) {
4294 void *Mem = C.Allocate(sizeof(ObjCSubscriptRefExpr));
4295 return new (Mem) ObjCSubscriptRefExpr(base, key, T, VK_LValue,
4297 getMethod, setMethod, RB);
4300 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
4301 QualType t, AtomicOp op, SourceLocation RP)
4302 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4303 false, false, false, false),
4304 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4306 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
4307 for (unsigned i = 0; i != args.size(); i++) {
4308 if (args[i]->isTypeDependent())
4309 ExprBits.TypeDependent = true;
4310 if (args[i]->isValueDependent())
4311 ExprBits.ValueDependent = true;
4312 if (args[i]->isInstantiationDependent())
4313 ExprBits.InstantiationDependent = true;
4314 if (args[i]->containsUnexpandedParameterPack())
4315 ExprBits.ContainsUnexpandedParameterPack = true;
4317 SubExprs[i] = args[i];
4321 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4323 case AO__c11_atomic_init:
4324 case AO__c11_atomic_load:
4325 case AO__atomic_load_n:
4328 case AO__c11_atomic_store:
4329 case AO__c11_atomic_exchange:
4330 case AO__atomic_load:
4331 case AO__atomic_store:
4332 case AO__atomic_store_n:
4333 case AO__atomic_exchange_n:
4334 case AO__c11_atomic_fetch_add:
4335 case AO__c11_atomic_fetch_sub:
4336 case AO__c11_atomic_fetch_and:
4337 case AO__c11_atomic_fetch_or:
4338 case AO__c11_atomic_fetch_xor:
4339 case AO__atomic_fetch_add:
4340 case AO__atomic_fetch_sub:
4341 case AO__atomic_fetch_and:
4342 case AO__atomic_fetch_or:
4343 case AO__atomic_fetch_xor:
4344 case AO__atomic_fetch_nand:
4345 case AO__atomic_add_fetch:
4346 case AO__atomic_sub_fetch:
4347 case AO__atomic_and_fetch:
4348 case AO__atomic_or_fetch:
4349 case AO__atomic_xor_fetch:
4350 case AO__atomic_nand_fetch:
4353 case AO__atomic_exchange:
4356 case AO__c11_atomic_compare_exchange_strong:
4357 case AO__c11_atomic_compare_exchange_weak:
4360 case AO__atomic_compare_exchange:
4361 case AO__atomic_compare_exchange_n:
4364 llvm_unreachable("unknown atomic op");